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Alona [7]
3 years ago
13

Describe natural selection- when does natural selection occur?

Biology
1 answer:
sashaice [31]3 years ago
7 0

Answer:

The process whereby organisms better adapted to their environment tend to survive and produce more offspring. The theory of its action was first fully expounded by Charles Darwin, and it is now regarded as be the main process that brings about evolution.

Four conditions are needed for natural selection to occur: reproduction, heredity, variation in fitness or organisms, variation in individual characters among members of the population. If they are met, natural selection automatically results.

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4 0
3 years ago
How does overtillage harm soil?
jeyben [28]

Answer:

A. Overtillage can increase the rate of humus decomposition

Explanation:

We refer to humus as any material of an organic nature that undergoes soil degradation. Humus is very important for agriculture because it has high nutrient levels that it provides to all crops. This causes more crop productivity, increases the producer's profit and increases the number of food available to the population.

Humus is a difficult to decompose material, but under favorable conditions it can decompose quite easily. Due to the presence of large amount of burnt organic matter in the soil, it is sometimes difficult to increase the humus content, so the exhaustion of this organic matter is caused by over tillage, especially in regions of tropical and sub-tropical climate, poorly managed. farmer protection and unprotected effects of erosion.

6 0
3 years ago
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pentagon [3]
<span>Option 1: Sunlight is the energy source for plant photosynthesis.
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Option 2: Chlorophyll is contained in organelles called chloroplasts.
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Option 3: A by-product of photosynthesis is carbon dioxide.
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Option 4: Roots have tiny root hairs that maximize the plant's ability to absorb water. 
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Explanation:

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Answer:

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