Answer:
b. increased efficiency in walking as forests transformed to wooded environments; the ability to carry food in order to provision family members.
Explanation:
Peter Rodman and his colleague proposed a 'patchy forest hypothesis' according to which forests become more patchy and the food in them is in dispersed form so, the hominids their can move efficiently with energy and can carry food now with free hands.
While Owen Lovejoy suggested that monogamous males, provision their females and protect them from predators, females that are provided with foods, could now take care of more than one offspring at a time, and thus reduce the gap between births.
Rodman proposed that human evolution was driven by efficiencies in walking due to environmental changes while Lovejoy suggested it was due to the ability to carry food and provision for family members.
Explanation:Peter Rodman and Owen Lovejoy were anthropologists who each contributed significant theories about the forces that drove human evolution. According to their theories, Peter Rodman proposed that human evolution was linked to the increased efficiency in walking as forests transformed into wooded environments. This transformation would have required our ancestors to travel further for resources, thus selecting for those who could walk more efficiently. On the other hand, Owen Lovejoy suggested the best explanation was the ability to carry food in order to provide for family members. In his view, the capacity to carry food would have promoted pair bonding and increased survival of offspring, propelling human evolution.
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When electrons flow along the electron transport chains of mitochondria
a. the ph of the matrix increases
b. ATP synthase pumps protons by active transport
c. the electrona gain free energy
d. NAD is oxidized
Answer: a. the ph of the matrix increases
Explanation:
NADH and FADH2 molecules resulting from the Krebs cycle (by reducing respectively NAD + and Electron and proton carriers (e- and H +), are oxidized in the final reactions of cellular respiration, and the electrons and protons are captured by oxygen, the final acceptor. The flow of electrons along the respiratory chain causes the active transport of protons along the chain through the inner membrane of the mitochondria. Protons return to the mitochondrial matrix by diffusion - chemiosmosis - and at the same time, ADP undergoes oxidative phosphorylation forming ATP. Because of this movement of protons inside the matrix, the ph of the matrix increases.
In the mitochondrial electron transport chain, ATP synthase uses proton gradient energy for ATP synthesis; electrons' energy decreases; NAD is oxidized; the pH of the matrix does not necessarily increase.
Explanation:The electron transport chain in mitochondria is part of the cellular respiration process during which energy is extracted from molecules such as glucose and transferred to other molecules (such as ATP, the main energy currency of the cell), a process that involves the flow of electrons. Here's what happens:
a. The pH of the matrix does not necessarily increase. The matrix contains a higher concentration of protons when the electron transport chain is active, which would actually decrease pH (meaning it becomes more acidic).b. ATP synthase does not pump protons, but it does utilize the energy from the flow of protons (down their gradient) to synthesize ATP from ADP and Pi (inorganic phosphate). This is known as chemiosmosis.c. Electrons don't gain free energy. The energy of the electrons is actually decreased as they are passed along the electron transport chain, and this energy is used to pump protons into the intermembrane space, creating a proton gradient.d. NAD is indeed oxidized, it loses its electrons to the first complex of the chain, becoming NAD+.Learn more about electron transport chain here:https://brainly.com/question/24368622
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If humans did not breathe in O2, we would not _____. make enough ATP to meet our energy requirements have enough enzymes to catalyze reactions be able to synthesize organic molecules from inorganic molecules be able to perform lactic acid fermentation be affected because we can switch to alcoholic fermentation
Answer: If humans did not breathe in O2, we would not make enough ATP to meet our energy requirements
Explanation:
During the last step of aerobic cellular respiration, the respiratory chain where oxidative phosphorylation occurs, most of the ATP generated in cellular respiration occurs. This step is coupled with the reoxidation of the NADH and FADH2 molecules, which become NAD + and FAD, respectively. In this reoxidation, high energy electrons are released which, after losing their excess energy, reduce the oxygen gas to water molecules. The energy released gradually by the electrons during their transfer to the oxygen gas is used in the production of ATP.
Final answer:
Without oxygen, humans would not be able to produce enough ATP to meet energy requirements efficiently, as they would have to rely on less efficient processes such as lactic acid fermentation instead of aerobic respiration.
Explanation:
If humans did not breathe in O2, we would not make enough ATP to meet our energy requirements. Oxygen is crucial for aerobic cellular respiration, a metabolic process that produces a significant amount of ATP by breaking down glucose in the presence of oxygen. When oxygen is not available, cells resort to fermentation to produce ATP, but this process yields significantly less ATP compared to aerobic respiration.
Fermentation, such as lactic acid fermentation, allows for the continued production of ATP in the absence of oxygen by converting pyruvate into lactate. This process is crucial during situations where oxygen supply is limited, such as during intense exercise. However, it is not as efficient in meeting the body's energy demands as aerobic respiration. With a limited oxygen supply, the human body could not sustain high energy needs over extended periods, impacting many biological functions.
Moreover, aerobic respiration enables the complete breakdown of glucose molecules, yielding up to 36-38 ATP molecules per glucose molecule, as opposed to only 2 ATP molecules per glucose molecule via glycolysis in fermentation. This vast difference underscores the essential role of oxygen in efficiently meeting the body's energy requirements.
Consider the following family history: Bob has a genetic condition that affects his skin. Bob’s wife, Eleanor, has normal skin. No one in Eleanor’s family has ever had the skin condition. Bob and Eleanor have a large family. Of their eleven children, all six of their sons have normal skin, but all five of their daughters have the same skin condition as Bob. Based on Bob and Eleanor’s family history, what inheritance pattern does the skin condition most likely follow?
Answer: the correct answer is X-linked dominant.
Explanation:
X-linked dominant is a mode of genetic inheritance in which a dominant gene is carried on the X chromosome.
The inheritance pattern suggested by the family history is X-linked recessive inheritance. The skin condition gene lies on the X chromosome. Hence, daughters inheriting the X chromosome with the defective gene from Bob have the skin condition, while sons who inherit the Y chromosome from Bob do not.
Explanation:Based on Bob and Eleanor's family history, the most plausible inheritance pattern for the skin condition is X-linked recessive inheritance. This means that the gene causing the skin condition is located on the X chromosome. In such a scenario, females (who have two X chromosomes) will develop the skin condition if they inherit the defective gene from both parents. However, in this case, since Eleanor does not carry the defective gene, the daughters who each received an X chromosome with the defective gene from Bob have the skin condition.
Conversely, the sons who received their fathers' Y chromosome instead of the X do not get the skin condition.
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Both a man and a woman are heterozygous for freckles. Freckles ( F) are dominant over no freckles ( f). What is the chance that their child will have freckles?
Answer:
75% chance or 3/4
Explanation:
If both parents are heterozygous and freckles is a dominant trait (F) then we can denote having no freckles as (f)
Using a punnett square, this will produce the following genotypes of the children:
FF, Ff, Ff and ff.
Therefore, there's a 3 out 4 chance or 75% of the children also inheriting freckles.
which kind of disturbance is most likely to precede primary succession?
This study is replicated in the Appalachian Mountains with similar results. Which of the following is true? The number of days with poor flower availability increased. The number of days with poor flower availability decreased. Flower availability fluctuated wildly. There was no change in the number of days with poor flower availability.
Answer:
There was no change in the number of days with poor flower availability
Explanation:
When replicating a study, the researcher develops the exact same study (experiment/treatment) in different places (experimental unit). In this case, as the researcher replicates the study in the Appalachian Mountains and gets similar results, that means that there was no change in the number of days with poor flower availability.
The impacts of climate change on the timing of flowering in plants can affect their availability to insect pollinators. But without specifics from the related study in the Appalachian Mountains, it's impossible to say whether days with poor flower availability increased, decreased, remained the same or fluctuated.
Explanation:The answer to whether the number of days with poor flower availability increased, decreased, fluctuated, or didn't change based on a study replicated in the Appalachian Mountains isn't provided in your question. However, studies show that temperature and precipitation, which are impacted by climate change, play crucial roles in the geographic distribution and phenology of plants and animals. As seen in Great Britain, climate change can cause plants to flower earlier than in previous years.
This is pertinent because if the insect pollinators don't emerge earlier in sync with the flowers, there could be harmful ecosystem effects as a result of this mismatch of timing. Consequently, there might be days of poor flower availability for these insects. But without specifics pertaining to the study in the Appalachian Mountains, a definitive answer can't be given.
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How does connective tissue differ from the other three major tissue types?
A. Connective tissue often consists of relatively few cells embedded in an extracellular matrix.
B. Connective tissue consists of contractile proteins.
C. Connective tissue consists of cells capable of transmitting electrical impulses.
There are three types of connective tissue. Connective tissue is found lining body surfaces.
Answer:
a
Explanation:
Connective tissue often consists of relatively few cells embedded in an extracellular matrix.
The male trees of a plant with vascular tissue and cones have multiflagellated sperm. The female trees produce rotten-smelling fleshy seeds that contain butyric acid. Which of the following is the most logical conclusion about the classification of this plant?
a. It belongs to the phylum Coniferophyta.
b. It belongs to the phylum Cycadophyta.
c. It belongs to the phylum Gingkophyta.
d. It belongs to the phylum Gnetophyta.
Answer: C. Phylum Gingkophyta.
Answer:
c. It belongs to the phylum Gingkophyta.
Explanation:
The tree in question is Ginkgo biloba, a tree belongs to the phylum Gingkophyta. It is a conifer. This species is the last species of this phylum, so often Ginkgo is called as ‘living fossil’. The male plant bears the male cone which produces multiflagellated sperms. Since it is a memebr of gymnospserm, it has well developed vascular tissue. The female trees produce fruits. The fruits emit very bad smell when left on the ground to rot. The rotting fruit releases butyric acid from the fleshy fruit wall sarcotesta.
If a DNA-binding protein reads a short stretch of DNA and detects the following second genetic code provided by the functional groups located on each base as H-HD-CH3-HA-HA-HA-HA-HD, then what is the corresponding sequence of bases?
CGGA
CAGA
CTGA
CTAG
Answer:
If I am being Honest I am not entirely sure but below I added a link that should explain everything. I hope this helps.
Explanation:
https://courses.lumenlearning.com/wmopen-biology1/chapter/dna-base-pairs-and-replication/
Which northern marine animal has ivory tusks?
Answer:
A walrus
Explanation:
Hile examining a specimen under the microscope, Janet discovers a structure that has some genetic material that has RNA but not DNA. What is the specimen? A. virus B. plant C. fungi D. bacteria E. animal
Answer:
A. Virus
Explanation:
Most viruses are either comprised of RNA or DNA for their genetic material.
Cardiologists and other healthcare professionals recommend that people who are at elevated risk for developing cardiovascular disease adopt an “anti-atherosclerotic” lifestyle to help prevent atherosclerosis. Which of the following is a component of an anti-atherosclerotic lifestyle?
Answer: the correct answer consumption of fruits and vegetables high in antioxidants.
Diet low in saturated fat and trans fat.
Smoking Cessation.
The anti-atherosclerotic lifestyle is smoking cessation, diet low in saturated fat and trans fat, and consumption of fruits and vegetables high in antioxidants. The correct option is D.
What is atherosclerotic?Atherosclerosis is a thickening or hardening of the arteries caused by plaque buildup in the artery's inner lining.
High cholesterol and triglyceride levels, high blood pressure, smoking, diabetes, obesity, physical activity, and consumption of saturated fats are all risk factors.
You can reduce plaques by losing weight, increasing your physical activity, or eating fewer foods high in saturated fat. Doctors may also prescribe cholesterol-lowering medications in some cases.
Atherosclerosis is a common condition that occurs when a sticky substance known as plaque accumulates inside your arteries.
The leading cause of death in the United States is atherosclerosis-related disease.
Thus, the correct option is D.
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Your question seems incomplete, the missing options are:
A) Smoking cessation
B) Diet low in saturated fat and trans fat
C) Consumption of fruits and vegetables high in antioxidants
D) All of these are components of an anti-atherosclerotic lifestyle.
On a blood smear slide prepared using Wright's stain, you observe a large cell with a U-shaped nucleus and pale blue cytoplasm. This cell is most likely a(n) __________.
a. eosinophil
b.monocyte
c. lymphocyte
d. basophil
The cell observed on a blood smear slide prepared using Wright's Stain with a U-shaped nucleus and pale blue cytoplasm is a monocyte. Monocytes are part of the immune system and can become macrophages that consume harmful pathogens. So, the correct option is b.
Explanation:On a blood smear slide prepared using Wright's stain, if you observe a large cell with a U-shaped nucleus and pale blue cytoplasm, this cell is most likely a monocyte. Monocytes are a type of white blood cell that have a large, often U-shaped nucleus and abundant cytoplasm that stains pale blue with Wright's stain. They play an integral role in our immune system, often transitioning into macrophages that can consume harmful pathogens or debris in our body.
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What happens when there is an error in the mechanisms by which chromosomes are passed down? What are some genetic disorders that can arise from mutations that are either inherited or acquired?
Answer:
Gene mutations can be classified in two major ways: ... These mutationsare also called germline mutationsbecause they are present in the parent's egg or sperm cells, which are also called germ cells. When an egg and a sperm cell unite, the resulting fertilized egg cell receives DNA from both parents.
The error takes place when the genes are copied and chromosomes are divided. They can lead to genetic disorders that are inherited.
What is gene mutation ?The mutation of the gene is the change in one or more genes that can lead to genetic disorders or the illness. The gene disorders are classified as per the 2 ways as germline mutations which are present in the parent's cells and are called germ cells. That can take place when the egg of the parent cell and the DNA unit.
Find out more information about the chromosomes
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A. 13
B. 6
C. 4
D. 7
Answer:
4
Explanation:
Plasma membrane of a skeletal muscle fiber - _________Extension of the sarcolemma that dives into the muscle fiber and surrounds - _________Modified smooth endoplasmic reticulum that wraps around the myofibrils and stores calcium ions - _________Point at which the sarcoplasmic reticulum swells where it meets a T-tubule - _________Rodlike bundle of contractile filaments found in muscle fibers - _________Long, filamentous proteins that constitute myofibrils - _________Myofilament composed of the contractile protein myosin - _________Myofilament composed of contractile protein actin and the regulatory proteins troponin and tropomyosin - ______
Answer:
1. Sarcolemma
2. T-Tubule
3. Sarcoplasmic reticulum
4. Terminal Cisternae
5. Myofibrils
6. Myofilament
7.Thick filament
8. Thin filament
Explanation:
These are all parts of the skeletal muscle and they are all involved in the contraction of your muslces.
The sacrolemma is also known as the myolemma. It is a specialized plasma membrane of the skeletal muscle cell. It is an excitable membrane that shares similarities to the cell membrane of a neuron cell.
The T-tubule extends from the sarcolemma to the sarcoplasmic reticulum (SR). This is the smooth endoplasmic reticulum of the muscle cell. When the sarcolemma gets excited, it triggers the SR to release the calcium ions stored in it. The release of Calcium ions triggers the contraction of myofilaments.
There are two types of myofilaments, the thick myofilament and the thin myofilament. These myofilaments contain contractile proteins, actin and myosin. Thick myofilaments contain myosin where one thick myofilament contains 300 myosin molecules. Thin myofilaments contain contractile and regulatory proteins. These myofilamens make up myofibrils.
Someone who is HIV positive and takes his/her arvs in time which led him to test when results shows negative. Can he transmit the virus to a partner who is negative?
Answer:
I believe the answer is No.
Explanation:
HIV is a virus which lacks the mechanism to reproduce since it is just an enclosed bunch of genetic material. With that in mind, it requires a mechanism to survive and reproduce and for that it targets the T-lymphocytes since the cells have receptors for the virus. It starts its cycle by attachment, penetration, biosynthesis, maturation and lastly budding. It adds it's genetic material to the DNA chains in the nucleus which the human cells replicate unknowingly. Most of the anti-retrovirals target to prevent this replication through targeting enzymes such as protease inhibitors. Taking of the drugs only reduces the replication of the virus lowering the viral count to less than 200 where we cannot count them anymore because they are widely distributed. Having a viral count <200 does not mean you are free of the virus but only that it is very low to be counted or cause significant health problems but the small number can still be transmitted if protection is not used.
Within a particular population, darkly colored rats are more likely to survive than more lightly colored individuals. This situation is likely to result in a. directional selection. b. stabilizing selection. c. disruptive selection. d. balancing selection.
Answer:
a. directional selection
Explanation:
Directional selection is a type of natural selection wherein one extreme trait is favored and the individuals with that extreme trait are at survival and reproductive advantage.
In the given example, dark-colored rats are favored by natural selection over the light-colored rats. This occurs because the rats with dark skin color have better survival rats in the prevailing surrounding. Since one extreme trait (dark skin color) is favored over the other (light skin color), the rat population is undergoing directional selection.
A dog breeder wishes to develop a breed that does not bark. She starts with a diverse mixture of dogs. Generation after generation, she allows only the quietest dogs to breed. After 30 years of work she has a new breed of dog with interesting traits, but on average, the dogs still bark at about the same rate as other dog breeds. Which of the following would be a logical explanation for her failure?
A. There is no variation for the trait (barking).
B. The tendency to bark is not a heritable trait.
C. The selection was artificial, not natural, so it did not produce evolutionary change.
D. There was no selection (differential reproductive success) related to barking behavior.
Answer: Option B
Explanation: There are basically two types of traits. Acquired and inherited traits.
Acquired traits: The traits that is acquired from the environment and cannot be inherited from one generation to another generation is known as acquired trait.
Such as time of barking, time of sleeping, amount of food that one animal eats.
Inherited traits: The traits that can be transferred from one generation to another generation is known as Inherited traits.
Example: fur color, height, eye color.
So, the condition here is rate of barking which is not a heritable trait and cannot transferred from one generation to another even by breeding for several generations(option B ).
Plants exchange gas with the atmosphere. Which statement accurately describes this process?
A. Plants release carbon dioxide and take in oxygen through the stomata in leaves.
B. Plants release oxygen and take in carbon dioxide through the xylem in leaves.
C. Plants release carbon dioxide and take in oxygen through the xylem in leaves.
D. Plants release oxygen and take in carbon dioxide through the stomata in leaves
Answer:
D. Plants release oxygen and take in carbon dioxide through the stomata in leaves.
Explanation:
The stomata are pores in plant tissues that permit gas exchange. Usually, they are found in the leaves but some plants have stomata on their stems.
The stomata allow the plant to take carbon dioxide, needed for photosynthesis, it is like the lungs for the humans.
I hope this answer helps you.
The ____________ describes a species as groups of organisms that interbreed, have a shared ____________ , and are reproductively isolated from all other species.
Answer:
1. Biological species concept
2. Gene pool
Explanation:
Biological species concept defines the species as a group of individuals that can interbreed to produce fertile progeny. The individuals from two different species cannot interbreed and produce viable and fertile progeny. This means that two species are reproductively isolated from each other.
The total number of genes and alleles present in the individuals of a species makes its gene pool. Each species has its unique gene pool.
The results of this experiment show that plants grow more in soil containing worms than in soil without worms. Which factors below helped the plants grow taller? Check all that apply.
A. Worms help move nutrients toward the roots of plants.
B. Worms produce nutrients, such as nitrogen, that are essential for plants to grow.
C. Worms create tunnels that allow the soil to absorb more water.
Answer:
All of them
Explanation:
The factors that helped the plants to grow taller are as follows:
Worms help move nutrients toward the roots of plants.Worms produce nutrients, such as nitrogen, that are essential for plants to grow.Worms create tunnels that allow the soil to absorb more water.How do worms supply nutrients to the plants?The body of worms decompose rapidly and are transformed into decomposers which convert the organic form of nutrients into an inorganic form that is easily assimilated by the plant's roots.
After transforming into decomposers, worms assist plants by the production and movement of the nutrients toward the plant's roots.
They also produce some tunnel-like structure that induces the soil to absorb and hold more water.
Therefore, it is well described above.
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An extremely fractious cat has been admitted to the facility. Due to its disposition, you are unable to remove it from its carrier. What opioid normally given by injection can be given orally for sedation or analgesia?
Answer:
The correct answer is buprenorphine.
Explanation:
The efficiency of the pain medication and that for how long the pain will be monitored generally relies upon on how closely the drug will associate with a receptor. The drug buprenorphine exhibits both high avidity and high affinity for the opioid receptors, thus, making it a highly efficient medicine for pain for feline pain relief. The majority of the formulations of the drug only offers six to eight hours of analgesia.
Ordinary cell division produces two daughter cells that are genetically identical. This type of cell division is important for all of the following functions EXCEPTA) growth of a multicellular organism.B) cell replacement.C) production of sperm and eggs.D) asexual reproduction.
Answer:
C) production of sperm and eggs
Explanation:
Sperms and eggs are the male and female gametes respectively. Formation of sperms and egg cells require meiotic cell division. Meiosis in sperm mother cells and egg mother cells reduces the chromosome number of half in the sperms and eggs. Meiosis also adds new gene combinations in these gametes by the process of crossing over.
Mitosis cannot reduce the chromosome number to half in the sperms and eggs. Absence of crossing over in mitosis leads to the formation of genetically identical progeny cells from mitosis.
Hence, mitosis can not form sperms and egg cells. If it does, the sperms and egg cells would not have genetic variations and there would be doubling of chromosome number with each round of sexual reproduction.
Mitosis is necessary for the growth of multicellular organisms, cell replacement, and asexual reproduction. However, it does not play a role in the production of sperm and eggs, which is conducted through Meiosis.
Explanation:Ordinary cell division produces two daughter cells that are genetically identical through a process known as mitosis. This process is fundamental for the growth of a multicellular organism, cell replacement in tissues throughout the body, and asexual reproduction in some organisms. However, when it comes to the production of sperm and eggs, a different kind of cell division occurs known as meiosis. Meiosis produces cells that are not genetically identical, therefore cell division via mitosis does not play a role in the production of sperm and eggs.
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A bird species known as the cattle egret is often found near farms in wet areas. The bird waits, sometimes even perched on a cow's back, until the cow kicks up a frog or fish while it walks. Then, the bird strikes and eats the exposed prey. This is an example of what kind of feeding relationship?
A. Detritus
B. Parasitic
C. Mutualistic
D. Herbivorous
Answer:
Mutualistic
Explanation:
Mutualistic relationship may be defined as a type of biological interaction in which both the organism are benefited from each other. This shows a positive type of relationship between the organisms.
The bird cattle egret perch on cow's back and eats the prey that hurdles the cow, in returns the cow provide food to the cattle egret. Hence, they shows mutual type of interaction with each other.
Thus, the correct answer is option (C).
In many cultivated plants (such as oranges, bananas, and potatoes), favorable characteristics often are created by careful genetic crosses. Of the following, which would be the best way to maintain the traits of a new variety with favorable characteristics
A) Selfing individuals of this new variety (i.e, crossing the offspring of one parental plant)
B) Artificially pollinating wild varieties with pollen from the new variety
C) Crossing the new variety with a variety that was homozygous recessive for all traits of concern.
D) Vegetative reproduction of the new variety
Answer:C
Explanation:crossing the new variety with homozygous recessive ones means there is high chance of these being dominant over the trait that Re of concern
Ava has arrived at the clinic for her well-child visit. She is 4 months old. Ava’s immunization record reveals that she has received the following vaccines: 2 doses of HepB 1 dose of Hib 1 dose of rotavirus 1 dose of PCV13 1 dose of DTaP 1 dose of IPV Which vaccines should Ava receive at today’s visit
Answer:
At 4 months old, the baby should receive the vaccines in order to get protected against the diseases like Diphtheria, tetanus and whooping cough, polio, Haemophilus influenzae type b, rotavirus, and pneumococcal infections. Thus, the child in the mentioned case will receive the second dose of DTaP, Hib, IPV, PCV13 and rotavirus vaccine.
In 20 to 25 words each, describe how socialization occurs in each of the following developmental periods:
a. Childhood (birth to age 12):
b. Adolescence (ages 13-17):
c. Transitional Adulthood (ages 18-29):
d. The Middle Years (ages 30-65):
e. The Older Years (ages 65 and above):
Answer:
During their childhood, kids learn about the world that surrounds them when going through 3 different phases regarding their body parts, and taking contact with their family and school; when puberty strikes, the learning shifts towards the teen's peer group and their chosen role models to create new patterns in behaviour and find themselves (adolescence). Once the individual enters adulthood and establish his/her personality, can form strong and intimate relationships with friends and romantic partners (transitional adulthood). When reaching the middle years, the person needs to contribute to society in some way to feel productive, like raising children or helping his/her community. Finally, during the older years, humans tend to reflect on their lives and accomplishments to develop a sense of either integrity or despair.
How has biodiversity been affected in areas where green crabs have been introduced?
A. Additional predators have migrated into the area to feed on the crabs, causing an increase in predator diversity.
B. Native shellfish populations have dramatically decreased as they are outcompeted by the crabs, causing a decrease in biodiversity.
C. The amount of predation on crabs by seabirds has gone up, but biodiversity has not been affected.
D. The overall number of crab species has dramatically increased, increasing overall biodiversity.
The correct answer is B) Native shellfish populations have dramatically decreased as they are outcompeted by the crabs, causing a decrease in biodiversity.
Biodiversity has been affected in areas where green crabs have been introduced in that native shellfish populations have dramatically decreased as they are outcompeted by the crabs, causing a decrease in biodiversity.
Green crabs represent a serious threat to biodiversity in the ocean ecosystem because they are predators that feed with animals that are part of the biodiversity such as clams, mussels, and oysters. As the predators they are, they can dramatically change the ecosystem by affecting the living and reproduction of many species.
Purple flowers are dominant to white flowers in pea plants. A gardener mates a purple plant with a white plant and records the offspring as having all purple flowers. The gardener just performed a(n) ________ and determined that the purple plant’s genotype was _________________
Answer:
The gardener performed hybrid crossing and the purple plant's genotype is: PP
Explanation:
Since we know the offspring's phenotype (appearance) is purple, the genotype can either be PP or Pp. We know that the farmer crossed a white plant, we can denote it's genotype as pp and a purple plant with a dominant trait. Because the farmer crossed the white plant with the purple plant, this tells us that the genotype of the purple plant must be PP.
Purple flowers are dominant to white flowers in pea plants. By performing a monohybrid cross and observing all purple offspring, the gardener determined that the purple plant's genotype is PP.
Explanation:The gardener performed a monohybrid cross by mating a purple plant with a white plant. Since all the offspring had purple flowers, we can conclude that purple flowers are dominant. Therefore, the purple plant's genotype must be homozygous dominant for the purple flower color, which is represented as PP. This is because, even when crossed with a plant possessing the recessive white flower color (pp), all the offspring expressed the dominant purple flower color, meaning the purple parent must have had two dominant alleles to pass on.
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