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kicyunya [14]
3 years ago
9

Mutations such as polyploidy and crossing over provide the genetic basis for

Biology
1 answer:
EleoNora [17]3 years ago
4 0

Answer;

Evolution

Mutations such as polyploidy and crossing over provide the genetic basis for evolution.

Explanation;

Evolution is the change in the characteristics or traits of a species over several generations and relies on the process of natural selection.

It occurs when some individuals or some alleles (alternative form of gene) reproduce themselves more than others,increasing their prevalence in subsequent generation.

Polypoidy and crossover brings about mutations that cause changes in characteristics and traits over time resulting to evolution.

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Which of the following structures are present in plant cells but absent in animal cells ?
Paladinen [302]

Answer:

Plant cells have a large central vacuole, a cell wall, and chloroplasts while animal cells do not.

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4 0
3 years ago
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Consider the model of the oxygen cycle as it moves through the various spheres of Earth. One assumption we can make after analyz
Afina-wow [57]

Answer:

B)Photosynthesis releases oxygen into the atmosphere while aerobic respiration removes oxygen from the atmosphere.

Explanation:

Only option B satisfies the answer to the question.

We know that photosynthesis is the process whereby green plants manufacture their foods in the presence of carbon dioxide and sunlight. Carbondioxie in the environment is used to manufacture food in plants. The bye product of photosynthesis is oxygen gas. Oxygen gas is used for aerobic respiration in animals and is essential for their life. This way photosynthesis adds to the pool of oxygen in the atmosphere and aerobic respiration removes from the pool.

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3 years ago
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Rachel Carson wrote about the delicate balance of organisms in a food web. Snakeheads, a freshwater fish that is not normally fo
kirill [66]
The snakehead could unreservedly eat little fish and scavangers, so that would evacuate/diminish the predator for zooplankton and phytoplankton. So zooplankton and phytoplankton populace would increment while little fish and scavanger populace would diminish. Presently if little fish and shellfish populace diminishes, their predators would have bring down sustenance, so vast fish pop. would diminish. On the off chance that vast fish pop. diminishes, their predators will have less nourishment thus the number of inhabitants in well evolved creatures will somewhat drop, however not by much, since they can feast upon zooplankton. 
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4 0
3 years ago
Why is the person with low level of hoemoglobin feels tired soon walking​
Georgia [21]

Answer:

When you have too little hemoglobin or not enough red blood cells, your body doesn't get enough oxygen so you feel tired or weak.

Explanation:

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3 years ago
If the body cells in individuals of a species have homologous pairs of chromosomes, the species is most likely to be
jeka57 [31]
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One CHROMOSOME from each SET will form a homologous pair


4 0
2 years ago
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