Answer:
Nitrogen cycle is a biogeochemical cycle that involves the circulation and conversion of nitrogen into different forms among the living and non-living components of the environment. The following are the steps in nitrogen fixation.
1 Nitrogen fixation.
2 Plants absorb nitrates and conduct assimilation.
3 Nitrogen flows through the food chain as a primary consumer eats the plant, and a secondary consumer eats the primary consumer.
4 A consumer releases waste and ammonification occurs to convert ammonia into nitrates and ammonium.
5 Nitrification occurs to convert ammonium into nitrates. Denitrification occurs to release nitrogen back to the atmosphere.
Starting from 1999, people had been testing the effects of pesticides. As early as the 2000s was when people first became of the dangers of pesticides
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The protein found in large amounts in the outermost layer of epidermal cells is collagen.
<u>TRUE</u>
Answer:
b.Photosynthesis
Explanation:
as plants produce 02 in the presence of light
1. A minute cylindrical organelle near the nucleus in animal cells, occurring in pairs and involved in the development of spindle fibers in cell division.
2. Centrioles are paired barrel-shaped organelles located in the cytoplasm of animal cells near the nuclear envelope.
3. Centrioles play a role in organizing microtubules that serve as the cell’s skeletal system.
4. They help determine the locations of the nucleus and other organelles within the cell.