Answer:
Friction
Explanation:
The efficiency of a machine depends upon the percentage ratio of output work to the input work. More the difference between the input and output work, lesser will be the efficiency of the machine. In real machines, the output is always less than the input because a lot of work is consumed against friction, resulting in reduced output.
The formula for efficiency is:
Efficiency= ( Output work/Input work) x 100%
Since the output will always be lesser than the input, the ratio of output/input will always be lesser than 1 and, therefore, the efficiency will always be lesser than 100%
Answer:
FRICTION
Explanation:
What happens to the body when motor neurons are injured?
Answer:
It loses muscle movement.
Explanation:
Just took a test about it on Edge. Hope this helps : )
A plant survives in a tropical rain forest. When placed in a temperate forest, it
dies within a year. What is the most likely characteristic of this plant?
O
A. The plant needs very stable weather.
O
B. The plant does not need sunlight.
O
C. The plant can stop water from evaporating.
O
D. The plant can live without much water.
Answer:
A. The plant needs very stable weather.
Explanation:
A plant survives in a tropical rain forest. When placed in a temperate forest, it dies within a year. The most likely characteristic of this plant is it needs very stable weather.
Answer:
The correct answer is option A. "The plant needs very stable weather".
Explanation:
The weather of tropical rainforests is very stable, having high humidity and temperatures that exceed 18 °C during all months of the year. A plant that is endemic to tropical rainforests and dies within a year in temperate forest most likely needs a very stable weather to survive. Temperate forest have very unstable weather, with summers that have an temperature average of 21°C and winter temperatures that are often below freezing.
Glaciers are most likely to advance during _______ summers.
Answer:
The correct answer would be Late.
Explanation:
Glaciers are the dense layers of solid ice which are accumulated on the tops of the mountains, or on the surface of the mountains, or on the rivers, near the poles, and they are moving slowly under their own mass or weight. Glaciers are most likely to advance during the Late Summers. When the summer passes and the heat accumulates and reaches the inner surfaces of the snow, it starts to advance in the late summers due to the continuous exposure to the sunlight. They start to melt and move forward in the late summers and heavy melting usually lead to floods in the nearby towns and cities.
Answer:
Cool
Explanation:
its from feedback 100 correct
all Answers below
1. Glaciers
2. Wind
3. continental
4. deflation.
5. ablation
6. suspension.
7. cool
8. particle size
9. abrasion.
10. Dust Bowl.
What happens to the products of the Krebs cycle?
A: Most become reactants in the electron transport chain.
B:They are stored in vacuoles and removed from the cell.
C:Most become reactants in protein synthesis.
D:They are released into the cell cytoplasm.
Answer: D:They are released into the cell cytoplasm.
Explanation: Krebs cycle also known as the citric acid cycle or the TCA cycle is a biochemical reaction utilized by all aerobic organisms. Krebs cycle cannot directly produce significant chemical energy which is adenosine triphosphate. The cycle Instead, produces NADH and FADH2 which are electron carriers, which then enters the respiratory cycle.
It is the major aim of the Krebs cycle to synthesis the electron carriers that is released into the cytoplasm to be used in cellular respiration.
The Krebs cycle, also known as the citric acid cycle or the tricarboxylic acid cycle, is a central metabolic pathway in cellular respiration.
The correct option is A.
It takes place in the mitochondria of eukaryotic cells and is involved in the breakdown of carbohydrates, fats, and proteins to produce energy in the form of adenosine triphosphate (ATP). During the Krebs cycle, acetyl-CoA (produced from the breakdown of glucose, fatty acids, or amino acids) enters the cycle and undergoes a series of chemical reactions, resulting in the generation of ATP, carbon dioxide (CO2), and reduced electron carriers (NADH and FADH2). These reduced electron carriers are then used as reactants in the electron transport chain, the final stage of cellular respiration.
In the electron transport chain, the electrons carried by NADH and FADH2 are passed along a series of protein complexes, leading to the production of more ATP through oxidative phosphorylation. This process occurs in the inner mitochondrial membrane.
Hence , A is the correct option
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Chimeras are interesting organisms that have two different sets of dna. Chimeras occur when when two different zygotes fuse to form one organism. Some chimeras have no outward symptoms,while some have two different eye colors it two different blood types what roles do mitosis and meiosis play in the process
Answer:
meiosis creates haploid sperm and an egg that fuse to form two zygotes. they then fuse together into a single embryo, and the process of mitosis allows the cells to divide. this process creates an embryo that has two different types of genetic material
Explanation:
plato answer but worded a little differently
Meiosis produces two zygotes from the union of haploid sperm and an egg. The cells might divide throughout the process of mitosis before they're fusing together to form an embryo.
What is chimeras?
An embryo with two separate types of genetic material is produced through this process.
In genetics, a chimera is a creature or tissue with at least two different sets of DNA, typically created by the fusing of numerous separate zygotes (fertilized eggs). The creature may eventually acquire organs with various chromosomal sets as it grows.
Therefore, the chimera, for instance, might contain a liver made of cells with one set of chromosomes and a kidney made of cells with a different set.
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When the quadriceps contact what also must happen at the same time?
A. The gastrocnemius must contract.
B. The hamstrings must relax.
C. The hamstrings must contact.
D. The gastrocnemius must relax.
Answer:
B. The hamstrings must relax.
Explanation:
When the quadriceps contact, the hamstrings must relax at the same time.
3. What portion of the solid waste produced in the United States is agri-
cultural waste?
Answer:
13%
Explanation:
The United States are one of the biggest producers of waste in the world. This should not come as a surprise considering that it is the country with the strongest economy, as well as having large population. The agriculture is highly developed in the United States, and while this results in high quality and high quantity of agricultural products being produced, it also creates lot of waste. The agriculture accounts for around 13% of the total solid waste produced by the United States, putting it on second place, only being behind the mining, oil and gas.
Which type of traits are determined by more than one gene?
Which of these earth spheres interacts with oceans during a hurricane?
Atmosphere
Cryosphere
Geosphere
Hydrosphere
Answer:
hydrosphere is the correct answer.
Explanation:
hydrosphere interacts with oceans during a hurricane.
The hurricane is a storm, forms over the tropical waters and called tropical cyclone.
In the lower Atlantic ocean hurricane forms over the warm ocean and the hydrosphere interacts with oceans.
The hydrosphere and atmosphere both get mix with each other which results in the high winds form of a hurricane.
Answer:
Atmosphere
Explanation:
A woman is heterozygous for a rare dominant autosomal genetic disease,
Neurofibromatosis. She marries a normal man (homozygous recessive for
Neurofibromatosis), who has Red-Green Color blindness, an X-linked recessive
trait. They have children. What is the phenotype ratio for the Neurofibromatosis
gene?
Answer:
The phenotypic ratio for the neurofibromatosis gene would be 1:1.
This is because woman has one dominant allele for neurofibromatosis, so there would be 50% of female gametes with dominant allele for neurofibromatosis. On the other hand, man is normal, so there would be all normal male gametes. Therefore, half of their progeny would have neurofibromatosis from mother.
Further explanation:
A). Dominant autosomal genetic disease.
A dominant autosomal genetic disorder can be defined as disorder, in which one mutated copy of gene (allele) is sufficient to affect the person. It is known as autosomal disorder as genes for this disease are present on autosomes.
B). Red-Green Color blindness.
Red-green color blindness is a sex-linked recessive genetic disorder, which mutated gene is present on X chromosome (sex chromosome). It is know as recessive as it is expressed only if both the recessive copies of X chromosomes are present.
C). Phenotype.
Phenotype of an individual can be defined as a set of features or characteristics, which are observable or expressed physically. For example, height, color of eye or hair, or observable traits for a disease
D).Phenotypic ratio of for diseased gene in children.
People with autosomal dominant disorder are affected with disorder either in heterozygous or homozygous dominant conditions. In this case, female is heterozygous and affected.
Assume genotype of woman is Aa (where 'A' represents dominant allele and 'a' represents recessive allele for neurofibromatosis).
On the other hand, man is normal for neurofibromatosis as he has both recessive alleles for neurofibromatosis. Assume genotype of man is aa (both recessive alleles).
Even if the man is affected with color blindness, there is no role of color blindness (a sex-linked disorder) in inheritance of neurofibromatosis, which is an autosomal disorder.
So, the phenotypic ratio for neurofibromatosis can be determined as:
Parents: Woman X Man
(Aa) (aa)
Gametes: ↓ ↓
A a a
(50%) (50%) (100%)
Children: Aa (with diseased phenotype) = 50%
aa (normal normal phenotype) = 50%
(For more information please find the Punnet square attached with answer).
Thus, phenotypic ratio for the neurofibromatosis would be 1:1 as 50% of their children are affected with disease.
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Grade: 5-9.
Subject: Biology
Subchapter: Genetics
Keywords: Autosomal dominant genetic disorder, color-blindness, X-linked recessive trait, phenotypic ratio.
The phenotypic ratio of neurofibromatosis gene will be 1:1 that is the 50% of the offspring will be affected.
Further Explanation:
Homozygous is the condition in which a particular gene has similar alleles present on a homologous chromosome. While on the contrary heterozygous condition is when a particular gene has dissimilar alleles present on the homologous chromosome.
If we take an example of Height where (T) represent tall and (t) represents dwarf, the homologous and heterologous condition can be represented as,
TT – tall homozygous condition
Tt- tall heterozygous condition
Autosomal dominant genetic disease- In this condition only one ‘dominant’ gene is enough to cause a disease or a condition. This occurs in only autosomes that is 22 pairs of chromosome other than one sex chromosome. In short the diseases which are caused by transfer of dominant autosomes which are affected are autosomal dominant genetic disease.
Neurofibromatosis- This is a genetic disorder which causes development of tumors in nerve tissue. These tumors can develop in any part from nerves, spinal cord or brain.
Let us consider the condition given in the problem,
Woman is heterozygous for neurofibromatosis- Nn
Man is homozygous recessive for neurofibromatosis- nn
The gametes which can be formed from Nn is N and n, while from nn two gametes n and n can be formed as shown in the image attached below.
The punnett square showing the number of offspring there genotype and phenotypes can be visualized in the image attached below.
We have the genotypic and phenotypic ratio as,
Genotypic ratio- 1 : 1
1 heterozygous dominant: 1 homozygous recessive
Phenotypic ratio- 1 : 1
1 neurofibromatosis: 1 non- neurofibromatosis
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Answer Details:
Grade: High school
Subject: Biology
Chapter: Genetics
Keywords:
Heterozygous, homozygous, neurofibromatosis, dominant, recessive, genetic disease, color blindness, children, offspring, phenotypic ratio, genotypic ratio, Heterozygous dominant, homozygous recessive.
What term describes a process the cell uses to control metabolism? lactic acid fermentation cellular respiration feedback inhibition ethyl alcohol fermentation
Answer:
feedback inhibition
Answer:
cellular respiration feedback
Explanation:
Cellular respiration feedback is the term that describes a process the cell uses to control metabolism.
Which shows the levels of organization within an ecosystem from largest to smallest? organism, population, community, ecosystem organism, community, population, ecosystem ecosystem, community, population, organism ecosystem, population, community, organism
Answer:
Ecosystem, community, population, organism
Explanation:
Ecosystem: It is a level of organization in which different communities of different organisms along with their related abiotic factors, interact with each other.
This is a level of organization smaller than a biosphere and a biome.
Community: It is a level of organization in which different populations interact with each other while living with each other. It is a level below ecosystem but above population.
Population: A group of organisms that belong to same specie and can interact with each other to produce fertile offsprings.
It is a level below ecosystem and community but above organism.
Organism:
A living organism that is made up of organs and organ systems. This is a level below population.
Hope it helps!
Answer:
c
Explanation:
Starting with the atom and ending with the biosphere, record the Levels of Organization found in life.
VERY VERY important!!!! NEED HELP!!! FAST!! BRAINLIEST REWARD!!!
Pick out the correct sentences that correctly characterize life in the intertidal zone.
The intertidal zone is mostly made up of soft body organisms that don't require much protection. Organisms use s uckers to anchor themselves to rocks. The spray zone is the most exposed to the elements outside the sea. The high-intertidal zone sees vast quantities and diversity in vegetation Nudibranchs are mostly found in the high-intertidal zone. The low-intertidal zone is characterized by small pools of water.
Answer:
Here's what I get
Explanation:
TRUE:
Organisms use s_uckers to anchor themselves to rocks. Examples are starfish and sea urchins.
The spray zone is the most exposed to the elements outside the sea. It is above high-water level, so organisms here must cope with exposure to air, heat, cold, and predators.
FALSE:
The intertidal zone is mostly made up of soft body organisms that don't require much protection. Instead, most of the animals in the intertidal zone have hard protective shells.
The high-intertidal zone sees vast quantities and diversity in vegetation. Instead, it is dry for long periods between high tides, so it is inhabited only by sea life that can withstand pounding waves.
Nudibranchs are mostly found in the high-intertidal zone. Instead, nudibranchs have soft bodies, so they inhabit the lower intertidal zone.
The low-intertidal zone is characterized by small pools of water. Instead this region is usually under water except at low tide.
Final answer:
In the intertidal zone, organisms have adaptations to survive dry periods and wave damage, with tough exoskeletons being common. The spray zone is most exposed, while the low intertidal zone has tide pools; but high-intertidal vegetation is sparse.
Explanation:
The intertidal zone is the region between high and low tide, constituting an environment that varies with the ebb and flow of tides. Organisms in this zone are adapted to being dry for extended periods and can withstand the damage from waves. The correct characterization of life in this zone includes organisms having adaptations such as tough exoskeletons to protect against desiccation and wave action, rather than being mostly composed of soft-bodied organisms.
The spray zone is indeed the most exposed to air and the elements, and the low intertidal zone often features small pools known as tide pools. However, the high intertidal zone is not characterized by vast quantities of vegetation due to the harsh conditions preventing many plants and algae from establishing themselves. Thus, the statement about a high diversity of vegetation in the high-intertidal zone and the presence of nudibranchs is incorrect; nudibranchs are more typical of other zones.
when the gravitational pull of the sun and moon partially cancel each other out,earth experiences a ___ tide.
Answer:
Neap tide
Explanation:
When the sun and the moon are positioned as such that a right angle is created, as shown in the picture, neap tides occur. This is because the moon and the sun are pulling in directions perpendicular to each other.Because the pulls are working against each other, so the bulges each create kind of spread out or cancel out. That's why they are weak.
Answer:
Neap tide
Explanation:
Neap tide is the type of tide that occurs when the moon is in its first and third quarter or when the moon appears half full in the sky.
The neap tide is also referred to as the smallest difference between the high and low tides.
They are gotten by picking the two lowest high tides of the month.
When a student adds a few drops of diluted picric acid to a paramecium slide, he observes that the paramecium releases some transparent spine-like projections to protect its body from the acid. What is the significance of these projections?
The projections that are released to protect its body from the acid are trichocysts. These trichocysts are released for the self-defense of the paramecium.
good day son
Answer:
The correct answer is - trichocysts
Explanation:
The picric acid is a organic compound that tastes bitter and explosive in nature. When its dilute solution is added to the Paramecium, it reacts against the picric acid by releasing transparent spine-like projections called trichocysts for its self-defence.
Trichocysts form a barrier around body of the Paramecium to protect its body from the picric acid.
Can you put these cats in the right order (from Largest to Smallest) according to their actual real-life size?
Answer:
I would say it goes something like this: Siberian Cat, British Shorthair, Turkish Van, and then Ragdoll Cats.
Explanation:
Siberian Cat Length - 17 to 25 inches, up to 25 lbs
British Shorthair Length- 22 to 25 inches, about 17 lbs
Turkish Van Length- I could not find the exact length, but they weigh less than the British Shorthairs, which are at 17 lbs, while the Turkish Vans weigh in at about 12-14 lbs.
Ragdoll Cat Length- Also could not find length, but they weigh about 8-15 lbs.
I hope this somewhat helps. Have a great day!
Answer: ADCB
Explanation: I did a few tries to find out the answer to this. It turns out it was this one! Your welcome for the answer! :)
Who developed the first scientific atomic theory?
O
A. Marie Curie developed the atomic theory after she discovered
radioactivity.
O
B. Antoine-Laurent Lavoisier wrote the atomic theory while making
gunpowder.
O
C. Robert Boyle proposed the atomic theory in his book The Skeptical
Chemist.
O
D. John Dalton developed the atomic theory, which he published in
1803.
The answer is "d" he developed a theory that matter is simply composed of atoms of different weights and is combined in ratios by weight.
D. John Dalton developed the atomic theory, which he published in
1803.
What is Dalton's Atomic Theory?The first part of his principle states that all be counted are made from atoms, which can be indivisible. The second part of the idea says all atoms of a given element are equal in mass and properties. The 3rd part says compounds are mixtures of two or more exceptional forms of atoms.
The 5 atomic models are as follows:
John Dalton's atomic model: Dalton´s Billiard Ball (Solid Sphere) version.
J.J. Thomson's version: Plum Pudding version.
Ernest Rutherford's model: Nuclear model.
Niels Bohr's model: Planetary version.
Erwin Schrödinger's version: Electron Cloud version/Quantum Mode
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A person receives an O allele and an A allele for blood type. What is the individual’s blood type? type A type B type AB type O
Answer:
type A
Explanation:
If a person receives an O allele from one parent and an A allele from another parent then this person will have A type blood.
Blood group of a person is decided by the presence or absence of antigen A and B & their antibodies. We have ABO type of blood group system in which A and B antigens are co-dominant i.e. if both the antigens are present on the surface of red blood cells then the person will have AB blood group because both are equally dominant.
Rest of the blood groups and their allelic combinations are mentioned as under:
A blood group → AA or AO
B blood group → BB or BO
AB blood group → AB
O blood group → OO
In the given question the person has one O allele but it is receiving an A allele also. A allele is dominant on O allele so the person will have A type blood group.
O type blood group will be exhibited by a person only when it has both the alleles as 'O'.
which is not a kingdom in the Eukarya domain
Answer:
Archaea
Explanation:
the eukarya domain has four kingdoms primarily protist,fungi,plantar and animalia
What kind of change occurs when salt dissolves in water
Answer: physical change
Explanation:
A physical change is defined as a change in which there is alteration in shape, size etc. No new substance gets formed in these reactions.
Example: Dissolution of salt in water
A chemical change is defined as a change in which a change in chemical composition takes place. A new substance is formed in these reactions.
Example: Oxidation of magnesium to give magnesium oxide
[tex]2Mg+O_2\rightarrow 2MgO[/tex]
Thus physical change occurs when salt dissolves in water.
Which of the following is NOT an example of bias?
A. Anti biofuel article written by a journalist working for an oil company.
B. Pro ADHD medicine article written by pharmaceutical company.
C. Pro high fructose corn syrup advertisements paid for by corn farmers.
D. Anti smoking article written by the National Health Association.
Answer: D. Anti smoking article written by the National Health Association.
Explanation:
Biasness can be define as the process of manipulating the evidences and sources so as to make profit. The biasness can be seen in the advertisement and research works so as to support the sales of a new product or innovation.
D is not biased because the article has been from a authentic source any discrepancy and manipulation cannot be observed as the results are obtain from experimental and observatory trials instead of external influence.
All of these are characteristics of the tropical rain forest except
a. lots of rainfall
b. nutrient rich soil
c. high temperatures
d. constant amoutn of sunlight
Answer:
b.nutrient rich soil
Explanation:
All of these are characteristics of the tropical rain forest except nutrient rich soil.
10. If two species occupy the same space, how might they adapt to avoid interspecific competition?
A. One species will start using another food source if possible.
B. Species don't avoid interspecific competition
C. The more adaptable species will quickly change their genes to eat another food.
D. The stronger species will cause the weaker species to die out in that area.
Answer:
A. One species will start using another food source if possible
Explanation:
Naturally, it is rare to see different species sharing the exact niche. They may feed on the same things but their diets may consist of a variety of sources. So one way to avoid interspecific competition is that one or both of the species can feed on another type of food source. Another way they can avoid this as well is change in feeding patterns, meaning they would feed at different times. Like one can eat at night, and the other would eat in the morning.
Photosynthesis occurs when
a. plants absorb energy from carbon dioxide
b. plants absorb energy from sunlight
c. oxygen concentration in the atmosphere increases
d. all of the above
Please select the best answer from the choices provided
Answer:
Option (B)
Explanation:
Photosynthesis is an important process that plants carry out, in which the plants absorb the energy provided by the sun, in the presence of CO₂, water and in return, liberates food, oxygen, and some water. This is how the green plants prepare their own food and the consumers are directly dependent on them.
This process helps in converting light energy into chemical energy.
Thus, the correct answer is option (B).
Photosynthesis occurs when plants absorb energy from sunlight. Therefore, option (B) is correct.
Plants, algae, and some bacteria use sunshine, carbon dioxide, and water to make glucose (chemical energy) and oxygen. Plant chloroplasts absorb sunlight to power photosynthesis. This energy powers biological activities that turn carbon dioxide and water into glucose.
Photosynthesis uses carbon dioxide and oxygen, but they are not energy sources. Sunlight powers photosynthesis. Therefore, option b is correct—plants absorb sunlight. Therefore, option (B) is correct.
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Functional proteins are enzymes that are made up of ___ and have an asymmetrical carbon.
A. proteins
B. vesicles
C. amino acids
D. carbohydrates
Functional proteins, vital enzymes are composed of amino acids. Variety in protein function and structure is made possible by the 20 different types of amino acids. A chiral center or asymmetric carbon atom in a protein enables its unique 3-dimensional structure.
Explanation:Functional proteins are enzymes that are fundamentally composed of amino acids. Amino acids are the building blocks of proteins and play a significant role in the body, including creating and repairing tissues and making enzymes and hormones. Hence, the correct answer is C. Amino acids. The presence of an asymmetric carbon atom, often called a chiral center offers these proteins their unique three-dimensional structure critical for their biological function.
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Enzymes, which are functional proteins, are composed of amino acids, and each amino acid includes an asymmetrical carbon. Hence the correct option is C.
Functional proteins, which include enzymes, are indeed made up of amino acids and have an asymmetrical carbon, known as a chiral center, in each amino acid residue. Enzymes are a type of protein that catalyze biochemical reactions in living organisms and are essential for various metabolic processes. Proteins are polymers, and their monomers, the amino acids, are linked together by peptide bonds to form long chains known as polypeptides. The unique sequence of amino acids dictates the protein's three-dimensional structure and function.
Why do gametes contain half the number of chromosomes as body cells?
Answer:
Explanation:
This is because meoisis division occurs in gamates which are sperm cell and egg cell . And in meoisis division the number of chromosomes for the daughter cells is half the number of chromosomes that the parent cell have. This is because when there is a fussion of male and female sex cells ,the zygote which is the daughter cell should have the 46 chromosomes which is the normal chromosomes for humans and when this chromosomes are in pairs then they should be in 23 pairs of chromosomes which are haploid and later be used for another cycle when the person matures and ready to reproduce
Gametes such as sperm and eggs contain half the number of chromosomes as body cells to ensure that upon fertilization, the resulting zygote has the correct number of chromosomes.
Body cells, also known as somatic cells, are diploid, which means they have two sets of chromosomes - one from each parent, totaling 46 chromosomes in humans. On the other hand, gametes, which are reproductive cells like sperm and eggs, contain half the number of chromosomes, or 23 in humans. This is because they are produced through a special type of cell division called meiosis.
During meiosis, the chromosome number is reduced by half to ensure that when two gametes merge at fertilization, the resulting zygote will have the correct number of chromosomes. Each parent contributes one set of chromosomes, so the zygote is equipped with a complete set, maintaining the species' chromosome number. This process not only allows for sexual reproduction but also introduces genetic variation, which is vital for the viability and evolution of a species.
It is important to correct the misconception that body cells are called gametes. In fact, the body cells, or somatic cells, have double the chromosomes found in gametes. Gametes are specifically designed to contain half so that normal diploidy is restored upon fertilization.
20 POINTS!!
If the tip of a sugarcane plant is removed from the field, even then it keeps on growing in length. Why?
Answer:
Because Intercalary meristems are found in the the stem part of the sugarcane in whole length.
Explanation:
As we have studied about meristem regions, that these are the regions found at the nodal areas which are able of cell division and growth. Intercalary meristem are present in the nodes of sugarcane stem which lead to the rapid increase in elongation of stem.Intercalary meristem are located at the base of leaves and nodes that leads to the increase in length. On the tip of sugarcane, apical or tip region meristem are found. When the tip region is removed, the presence of intercalary meristems play the role by facilitating the elongation of stems in sugarcane.Please see attached image for better understanding.
Hope it helps!
Select the correct answer. Why did Mao Zedung get involved in the Korea War?
Answer:
china thought the us might take their land
Explanation:
Answer:
The answer is Mao was worried about his border with North Korea being in jeopardy.
Explanation:
Mao Zedong was characterized as the leader of the Communist Party of China and the People's Republic of China. Thanks to him the Communist Party took power in China in 1949, and involved China in the Korean War because China warned that it would react if the UN military forces crossed the border with the Amnok River, but Mao waited for the Soviet help before attacking. One of his phrases about Korea is famous: "as close as lips and teeth"
Environmental factors can influence the gene expression in some organisms. Using a specific example, explain how a lighter shade of a color can affect the gene expression in an organism where lighter shading affects the phenotypes of the organism. First answer will mark as the brainliest
An example is the drop of white-colored moths and an increase in dark-colored moths in London after the industrial revolution. Because darker-colored moths could camouflage well in the sooty environment (due to industrial emissions), they were preyed less by their predators. White-colored moths stood out and due to being preyed more their numbers declined over generations – because they wouldn’t survive long enough to reproduce and pass their genes to the next generation. The predominant color for the moths’ population became dark color.
Environmental factors such as ultraviolet (UV) light can significantly influence the expression of genes related to skin color in humans, leading to changes in melanin production and resulting in a darker pigment as an adaptive response.
Explanation:Effects of Environment on Phenotype
Environmental factors play a crucial role in the expression of genotypes in organisms, influencing phenotypes across various species. A clear example of this is seen in the variable pigmentation of human skin. While skin color is determined by multiple genes, the exposure to environmental elements like sunlight can markedly alter pigmentation levels. Specifically, exposure to ultraviolet (UV) light signals melanocytes in the skin to increase the production of melanin, leading to a darker complexion. This is a direct instance where an environmental stimulus affects gene expression, altering the phenotype.
In simple terms, while our genes provide the blueprint for traits such as skin color, the environment in which we live can impact how these genes are 'read' and 'acted upon' by the body. This results in the phenotypic variations we observe, not only in humans but across a wide range of organisms. Consequently, identical genetic information can lead to diverse phenotypes under different environmental conditions.