Question text
Look at the scientific names below. Which 2 organisms are most closely related? Explain your answer using a complete sentence.
Populus deltidoes
Canis lupus
Felis domesticus
Canis familiaris
Canis lupus (wolf) and Canis familiaris (domestic dog) are the most closely related organisms, sharing the same genus and with the domestic dog being a subspecies of the wolf.
The two organisms that are most closely related are Canis lupus and Canis familiaris. These organisms share the same genus, Canis, which indicates that they belong to the same group that includes dogs, wolves, and other dog-like animals.
Furthermore, Canis lupus familiaris (the scientific name for the domestic dog) is a subspecies of Canis lupus (the wolf), according to the binomial nomenclature system developed by Linnaeus, which uses two names to refer to species. This implies that they have a very close genetic relationship and are capable of interbreeding to produce viable offspring.
A student is standing 8 m from a roaring truck engine that is measured at 20 db. The student moves 4 m closer to the engine. What is the measured sound intensity at the new distance?
Answer:
80 dB
Explanation:
Sound intensity is inversely proportional to the square of the distance traveled by the sound.
Thus;
r1^2 divide by r2^2 = L2divideL1
where r= distance (m)
L= sound intensity (decibal dB)
8squared divide by 4 squared = L2 divide 20 dB
L2 = 4 × 20
L2= 80 dB
This means that the sound is increased from 20 dB to 80 dB.
Answer:
The answer to the question above is explained below
Explanation:
The loudness or sound intensity of the roaring truck engine is inversely proportional to the square of the distance.
r1^2 / r2^2 = L2/L1
Where, r1 and r2 = old distance and new distance respectively,
L1 and L2 = old sound intensity and new sound intensity respectively.
From the parameters given above,
r1=8m
r2=4m
L2=?
L1= 20dB
8^2 / 4^2 = L2 / 20 dB
L2 = 80 dB
The answer is 80 dB. Increased from 20 dB.
Decibel (dB), is a relative unit of measurement used for expressing the ratio between two physical quantities, usually electric power, or for measuring Sound intensity. Decibels measure the ratio of a given intensity to the threshold of hearing intensity.
Sound intensity, also known as acoustic intensity, is a vector describing the intensity of a sound is proportional to its amplitude squared.
Which of the following build(s) new strands of DNA? View Available Hint(s) Which of the following build(s) new strands of DNA? The origins of replication The lagging strand The leading strand DNA polymerases Parental DNA
Answer:
DNA polymerases
Explanation:
DNA polymerases are enzymes that are responsible for the synthesis of DNA strands from the DNA building blocks called deoxyribonucleotides.
DNA polymerases are usually involved in DNA replication, by creating a pair of identical strands of DNA from a single molecule of DNA, in other words, two identical molecules of DNA are formed from the copying of a double stranded DNA.
DNA polymerases are found in both eukaryotic cells and prokaryotic cells.
DNA polymerase builds new strands of DNA from the already existing DNA molecule. Therefore, the correct option is D.
DNA synthesis occurs through semiconservative replication, in which a new DNA strand is synthesized using a pre-existing DNA molecule as a template.
There are multiple enzymes that help in the process of replication, of which the major role is played by DNA polymerase.
DNA polymerase adds nucleotides in the newly synthesizing strain in the 5'-3' direction.The nucleotides are added complementary to the template strand which is read in the 3'-5' direction.
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What enzyme is lacking in the Escherichia coli strain used by Okazaki in the experiments leading to his discovery of the DNA fragments that will form the lagging strand?
a) DNA polymerase
b) telomerase
c) DNA ligase
d) pyrophosphatase
Describe the habitat of the giraffe.
Answer:
Giraffes can inhabit savannas, grasslands or open woodlands.
Explanation:
Generally, the hormones secretin and cholecystokinin which are released by duodenal enteroendocrine cells will ________. decrease the activities of the accessory digestive organs increase the force of stomach contractions increase the release of digestive enzymes and bile increase stomach emptying
Answer:
c. increase the release of digestive enzymes and bile
Explanation:
Secretin and cholecystokinin are hormones produced in the duodenal region of the small intestine. They are both involved in the release of digestive enzymes and bile.
Secretin is actively involved in controlling the pH of the chyme when it enters the duodenum from the stomach. It does so by inhibiting the release of gastric acid from the parietal cells in the stomach. Secretin induces the release of sodium bicarbonate ions from the pancreas which help to increase the pH of the chyme. This hormone also stimulates the secretion of bile.
Cholecystokinin (CCK) stimulates the contraction of the gallbladder and the release of bile into the duodenum. CCK also acts on the pancreas, stimulating it to produce pancreatic juices for digestion.
Identify the cavity that develops entirely from the mesoderm.
What are two ways that diatoms differ from slime molds?
Predict the most likely effect of a two-nucleotide deletion in the middle of the intron located between exons 4 and 5 on the structure of protein A. Justify your answer.
Answer:
It is likely that this change has no effects on the protein function.
Explanation:
In eukaryotes, genes are composed of coding (exons) and non-coding (introns) sequences. Since introns are not transcribed into messenger RNA, mutations affecting these sequences generally are neutral; however, it is important to note that introns may regulate gene expression
Introns are the noncoding regions, which are present on the sections of the RNA transcript or DNA. The coding regions of the DNA molecules are known as exons. The introns are spliced out to continue translation.
The mutation, like insertion or deletion in the sequence of the introns, will not affect the molecule, such that it will be neutral.
Splicing is an essential process in which the sequence of introns is eliminated and only a sequence of exons are present. The splicing results in the formation of a mature RNA molecule, which is then translated into protein.
Introns are the intervening sequence, which can affect the gene expression by increasing the rate of transcription, nuclear export, and the stability of RNA transcript.
However, the introns can regulate gene expression.
Therefore, introns are the non-coding sequence, in which mutations are neutral but they can regulate the gene expression.
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This is the application of a wide range of sciences to answer questions of interest to a legal system. DNA analysis is one component that may be used to place a suspect at a crime scene is called
Answer:
This is the application of a wide range of sciences to answer questions of interest to a legal system. DNA analysis is one component that may be used to place a suspect at a crime scene is called Forensic science
Explanation:
Forensic science the use of fingerprint, DNA to detect crime occurrence which gives accurate results as each individual is made of different DNA molecule
Which occurs when the body responds to the environment by maintaining a stable internal environment despite changing
external conditions?
O spontaneous generation
O homeostasis
growth and development
O reproduction
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How does recombination contribute to evolution?
Answer: This crossing-over process results in an unlinking and recombination of parental genes. ... Subsequently, recombination by itself does not cause evolution to occur. Rather, it is a contributing mechanism that works with natural selection by creating combinations of genes that nature selects for or against.
Explanation:
Hope this helps!
Answer:
Recombination is an event, occurring by the crossing-over of chromosomes during meiosis, in which DNA is exchanged between a pair of chromosomes. ... Like mutation, recombination is an important source of new variation for natural selection to work upon.
Explanation:I just right on my test, unit test, assignment,and unit exam.
Which of the following evidence best supports a claim that tryptophan functions as a corepressor? A. Normal expression of trpR causes the trp operon to be transcribed regardless of tryptophan levels. B. When the operator sequence is mutated, the trp operon is not transcribed. C. The trpR gene codes for a repressor protein that has a DNA binding domain. D. When trpR is mutated, the trp operon is transcribed regardless of tryptophan levels.
Tryptophan functions as a corepressor by binding to the trp repressor to inhibit the transcription of genes involved in tryptophan biosynthesis.
Explanation:When tryptophan is not present in the cell, the repressor by itself does not bind to the operator; therefore, the operon is active and tryptophan is synthesized.
However, when tryptophan accumulates in the cell, two tryptophan molecules bind to the trp repressor molecule, changing its shape, allowing it to bind to the trp operator.
This binding of the active form of the trp repressor to the operator blocks RNA polymerase from transcribing the structural genes, stopping the expression of the operon.
36. Mammals are exposed to a variety of outside temperatures. However, they are able to
maintain a constant internal body temperature. Describe ways that mammals warm and
cool themselves in response to their environment. Include in your response:
Answer:
they cool them selfs by getting in water they heat themselfs by laying in the sun.
Explanation:
is this the answer your looking for?
A cane toad produces a toxin (poison) in a gland behind its ear which can kill predators
that try to catch it and eat it for food. Some hedgehogs have a mutation which blocks
this toxin (poison) from entering their cells and keeps them from being harmed when
they catch and eat a cane toad,
Based on the information given above, Pick the statement below that best describes
the mutation of the hedgehog.
This mutation is neutral because it doesn't really help or hurt the hedgehog.
This mutation is harmful because the poison would still be in the body of the hedgehog if it ate the
cane toad.
This mutation is helpful because it makes the hedgehog immune to the cane toad toxin (poison) so
the hedgehog has more food sources for survival.
This mutation is helpful because it might make the hedgehog not be harmed by all toxins
(poisons).
Answer:
the first one
Explanation:
the mutation is nuertal because hedgechogs dont eat that much meat
During rolling-circle replication, RepA binds to the ori and nicks one strand of the DNA. The ______ end of the nicked DNA serves as a primer and is extended by DNA polymerase, while the ______ end is coated with single-stranded DNA-binding proteins and replicated using RNA and DNA polymerases.
Answer:
E
Explanation:
Changes to an ecosystem’s biodiversity can have a direct effect on humans because humans –
A : inhabit all areas of the Earth’s ecosystems.
B : use minerals from the ground to make things
C : rely mostly on solar power for energy.
D : depend on the Earth’s natural resources
Answer:
The answer should be D.
Changes to biodiversity can affect humans because they depend on Earth's natural resources.
Explanation:The correct answer is D: depends on the Earth's natural resources.
Changes to an ecosystem's biodiversity can have a direct effect on humans because humans depend on the Earth's natural resources. Biodiversity refers to the variety and abundance of different species in an ecosystem. These species play important roles in providing resources such as food, water, and medicine, which are essential for human survival and well-being.
For example, if the biodiversity of a forest ecosystem decreases due to deforestation, humans may lose access to important resources such as timber for construction, medicinal plants, and clean water sources. This can have negative impacts on human health, livelihoods, and overall quality of life.
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what fruit type is a strawberry ?
Answer:
Strawberries and raspberries aren't really berries in the botanical sense. They are derived from a single flower with more than one ovary, making them an aggregate fruit. True berries are simple fruits stemming from one flower with one ovary and typically have several seeds.
Answer:They are derived from a single flower with more than one ovary, making them an aggregate fruit.
Explanation:
Water-soluble vitamins:_________. a. are stored in body tissues to a large extent. b. often result in toxicities among infants and children. c. are easily excreted in the urine. d. dissolve in body fluids but not in cooking water. e. are not easily damaged by high temperatures or oxygen exposure.
Answer:
CExplanation:
1. Vitamins are of two types; i) water soluble and ii) fat soluble.
Water-soluble vitamins are:
2. They are soluble in water but insoluble in lipids.
3. Example of water soluble voitamins'
i) Thiamin (Vitamin B1)
ii) Riboflavin (Vit. B2)
iii) Niacin (Vit. B3)
iv) Pantothenic Acid.
v) Vit. B6.
vi) Folic Acid and vii) Vitamin B12.
4. Water soluble vitamins are easily excreted through the urine. Water-soluble vitamins are carried to the body's tissues but they are not stored in the body.
Answer:
c. are easily excreted in the urine.Explanation:
Vitamins are important organic molecules that play important roles in the process of metabolism of the organisms directly or indirectly. Since they require in small quantity or amount so-known as a micronutrient and categorized as an essential micronutrient. On the basis of their solubility, they are classified as water-soluble vitamins such as vitamin C, B complex and some other and the other category is fat solubles such as vitamins A, K and some other. Water-soluble vitamins are easily soluble in water and thus they excrete through the urine and thus are not stored in the body. Fat-soluble vitamins like vitamins A and some others are stored in the fat in the body.The overgrowth of algae on the surface of this water is caused by
A) a decrease in the oxygen levels in the water
B) not enough primary consumers in the ecosystem
C) an increase in nitrogen levels in the water from fertilizer runoff
D) an excess of carbon dioxide in the water due to an increase in the number of fish
Answer:
The answer is C. an increase in nitrogen levels in the water from fertilizer runoff
Explanation:
The overgrowth of algae on the surface of this water is caused by an increase in nitrogen levels in the water from fertilizer runoff.
An increase in nitrogen levels in the water from fertilizer runoff. Thus the correct option is C.
What is algae?Algae is defined as a group of predominantly aquatic, photosynthetic, and nucleus-bearing organisms that lack the true roots, stems, leaves, and specialized multicellular reproductive structures of plants.
Excess nitrogen and phosphorus cause an overgrowth of algae in a short period of time, also known as algae blooms. The overgrowth of algae consumes oxygen and blocks sunlight from underwater plants.
Aquatic herbicides used to treat algae are called algaecides. They're often copper-based compounds (e.g. copper sulfate, copper chelate communes, chemical Endothall). Effective if the entire surface is treated.
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Mitochondria create proteins used to build many things in the body.
Is this true or false?
Answer:
True
Explanation: I got it right on my exam and unit est and assignment .
Mitochondria create proteins used to build many things in the body. The given statement is true.
What is protein?
Protein is defined as the large macromolecules and biomolecules that are made up of long chains of amino acid. There is various function of protein such as DNA replication, speeding up chemical reaction, and helps to maintain the structure of cell.
The main function of protein is to maintain the structure and function of organs, repair muscle, and muscles. Diet contain high protein is recommended for the purpose of losing weight, reducing fat, or increasing fat.
There are several types of protein such as structural protein, transport proteins, antibodies, contractile proteins, hormonal proteins, and enzymes.
Enzymes are the biological catalyst that speed up the chemical reaction that carries out in the body. Enzymes are protein by nature and there are number of enzymes present in our body such as salivary amylase, pepsin, renin, lyases, lygases etc.
Therefore, Mitochondria create proteins used to build many things in the body. The given statement is true.
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how does oxygen affect sea otters?
Explanation:
according to biologists. org oxygen consumption thermoregulation and the effective for oiling and washing on the sea otter in Hydra lutris.....found on the web according to just buy fax.com otters can stay submerged for 5 to 8 minutes depending on the species because their heart rate slows and they use less oxygen p
River otters breathe air for oxygen, just like all mammals. They rise to the surface to breathe if they are submerged. They create openings, so they can emerge to breathe if the water freezes over during the winter.
What is the effect of oxygen in sea otter?A sea otter can climb rocks and even breathe air, yet it needs the ocean to survive. Its food is found in the ocean, and despite having webbed back feet, it crawls awkwardly on land.
But they require breathing to obtain oxygen, just like any other creature does.
They might not need to breathe as frequently as other aquatic organisms because the river otter can hold its breath for up to eight minutes underwater.
Therefore, Sea otters have a variety of adaptations that enable them to live in their harsh sea environment.
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What are the benefits of early cpr and early defibrillation when a person is in cardiac arrest?
Answer:
For better chance of survival
Explanation:
Early CPR and early defibrillation gives a person (having cardiac arrest), a chance to survive especially if he/she is out-of-hospital.
This essential emergency service must be provided with in 3-4 minutes of cardiac arrest followed by further life support.
Early CPT helps to maintain blood flow to vital organs and rapid defibrillation is provided through pads attached to the victim's bare chest to administer normalcy
Early CPR and defibrillation significantly increase the survival and recovery chances of a person experiencing cardiac arrest by maintaining blood flow and attempting to restore the heart's normal rhythm.
The benefits of early CPR (cardiopulmonary resuscitation) and early defibrillation when a person suffers a cardiac arrest are profound. Early CPR helps maintain vital blood flow to the heart and brain, buying time until defibrillation can be performed. When early defibrillation is administered, it sends a large charge in a short burst to the heart, potentially stopping an irregular heartbeat (ventricular fibrillation) and allowing the heart's natural pacemaker to restore a normal rhythm. This is crucial since each minute of delay in defibrillation reduces the chance of survival by roughly 10%. Due to their importance, defibrillators are now widely available in public places, and they often come as AEDs (Automated External Defibrillators) which can be used by anyone since they provide verbal instructions and automatically determine the appropriate shock. Therefore, the immediate application of CPR followed by timely defibrillation greatly increases a person's chance of survival and recovery after cardiac arrest.
You are a molecule of nitrogen. Choose a starting point in the nitrogen cycke and describe the process you would go through to move through the entire cycle
Answer:
Starting from the air
Explanation:
First Nitrogen in the air makes its way into the soil where nitrogen fixation occurs. This is done by specialised nitrogen fixing bacteria where it either becomes ammonia or ammonium. This is called ammonification. Nitrifying bacteria uses these components to create nitrates and the cycle moves into assimilation where this is taken up by plants and animals. Finally, denitrification occurs when the organic matter that took up the nitrogen decomposes to release the nitrogen back into the air.
During a chemical reaction, which of the
following does the arrow stand for?
A. relates
B. copies
C. yields
Answer:c
Explanation:
During any chemical reaction, arrow stand for yields. The correct option is C.
What is a chemical reaction?A chemical reaction is a process that converts one or more substances, known as reactants, into one or more different substances, known as products. Chemical elements or compounds are examples of substances.
In this reaction, arrow sign is used in between reactants and products which indicates that the reactant will lead to the product.
Thus, the correct option is C.
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What is the main purpose of seeds in plants that have them?
Answer:
Fruit (pods or hulls etc) bearing seeds are a means of dispersal for plants because they are sessile and have no means to move once germination anchors them with roots. Seeds are the dormant propagules or the quiescent, dispersing agents of the next generation that travel away from the parent plant in a disposal. This is why fruit/seeds are categorized by their dispersal by wind (hydrochoric) or by animals (zoochoric).
Explanation:
the main purpose of seeds in plants Seeds serve as a means of reproduction for plants that have them and that contain the genetic information necessary to produce a new plant.
What is the significance of the seeds of the plant?Seeds provide an efficient way for plants to spread and colonize new areas, protect the developing plant embryo from the harsh environment, and also provide food for a variety of organisms, including birds, insects, and mammals. Seeds are an important source of food for humans and livestock, as many staple crops, such as rice, wheat, corn, and beans, are produced from seeds.
Hence, the main purpose of seeds in plants Seeds serve as a means of reproduction for plants that have them and that contain the genetic information necessary to produce a new plant.
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Which best describes an organism's niche?
life span
habitat
environment
role
Answer: Role
Explanation:
Answer:
The answer is D.) role
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Some shells grow
a. Rainbows
b. Four feet long
C. Butterfly wings
what is the water cycle
Answer:
The water cycle, also known as the hydrologic cycle or the hydrological cycle, describes the continuous movement of water on, above and below the surface of the Earth.
Explanation:
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7. Which has an exoskeleton?
A. a rhinoceros
B. a ladybug