Top answers

What is nitrogen fixation?

Nitrogen fixation is one stage of the nitrogen cycle. The nitrogen cycle describes the different transformations of the forms of nitrogen in nature. The nitrogen cycle is important because plants need nitrog...
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Answered by Eleanor B. • Biology tutor
8511 Views

What is the equation for aerobic respiration in humans?

glucose+oxygen-->water+carbon dioxide c6h12o6+6o2-->6h2o+6co2
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Answered by Mara E. • Biology tutor
4463 Views

Could you explain the difference between passive diffusion and facilitated transport?

Passive diffusion occurs without any transmembrane proteins being involved, the molecules cross the lipid bilayer following a concentration gradient (from the highest concentration to the lowest). Small unch...
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Answered by Eleonore W. • Biology tutor
3778 Views

How does the body regulate heat?

Body temperature is regulated by a thermoregulatory centre in the brain, the hypothalamus. The hypothalamus can sense the temperature of the blood via receptors. The skin also contains temperature receptors ...
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Answered by Natasha C. • Biology tutor
3047 Views

If the concentration of testosterone in a man’s blood starts to rise above normal, this system leads to a reduction in testosterone. How does this occur?

Students are aware of the Hyothalamus-pituitary axis (HPA axis) in the female, but are not as aware about the role of the HPA axis in the male reproductive system. Here,we should start off by explaining the ...
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Answered by Thahesh T. • Biology tutor
4337 Views