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pickupchik [31]
2 years ago
8

Imagine what happens if materials are not send out of the body from time to time ?​

Biology
1 answer:
scZoUnD [109]2 years ago
5 0

Explanation:

excretory system is present in human body which discharge out the waste material time to time. basically when a cell in a body breaks down they produce various waste material like carbohydrates eliminates carbon dioxide while digestive system eliminates through feces. any malfunctioning can cause serious problem like constipitation kidney failure and kidney stones

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Greg is telling his teacher how a cell is like a house. Which part of a cell is like the air in Greg's house?
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The air in Greg's house is like the cytoplasm of a cell because it is the gel-like material that surrounds the other parts of the cell. 
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3 years ago
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Which of the following is a positive aspect of genetically engineered crops for the environment?
padilas [110]
You don't have to wait for the crops to grow on their own 
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3 years ago
During drought years, seeds with thin coats are more likely to desiccate (dry out) and not be able to germinate
Morgarella [4.7K]

Directional selection favors one of the extreme phenotypes. Option B). Fewer plants with thin seed coats will be able to germinate, leading to a higher proportion of plants that produce seeds with thick seed coats.

<h3>What is directional selection?</h3>

Directional selection increases in the proportion of individuals with an extreme phenotypic trait.

There must be a selective pressure or environmental pressure acting on populations to lead the species to increase the number of individuals expressing that extreme phenotype.

This selection presents more frequently in those cases in which interactions between living organisms and the environment modify in the same direction.

In the exposed example the environmental pressure is drought during several years.

Drought periods decreases the fitness of plants that produce thin seed coats because they dehydrate before germinating.

Originally the population expressed both types of seeds. But after the drought pressure, only plants that produce seeds with thicker coats got to survive and reproduce.

The correct option is B). Fewer plants with thin seed coats will be able to germinate, leading to a higher proportion of plants that produce seeds with thick seed coats.

You can learn more acout directional selection at

brainly.com/question/12226774

#SPJ1  

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2 years ago
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