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What is natural selection?

Natural selection is one of the fundamental mechanisms of the process of evolution. There are 4 key things to remember about the process of natural selection.1) There is genetic variation within a population...
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Answered by Eva E. • Biology tutor
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Draw and label an animal cell as seen under an electron microscope.

Now the first thing to point out when looking at images under an electron microscope is the scale. For example, something that you draw as 3cm long, may in fact be 10, 000 times smaller in real life. So it i...
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Answered by Isabella U. • Biology tutor
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What is the difference between mitosis and meiosis?

Essentially they both describe the same biological process whereby chromosomes are divided during cell division. Mitosis produces two diploid daughter cells which are identical to eachother (produces new som...
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Answered by Keslin G. • Biology tutor
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How does blood flow through the heart?

Deoxygenated blood enters the heart through the superior/ inferior vena cava into the right atriumThe atria contract and blood flows through the tricuspid valve into the right ventricleThe right ventricle co...
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Answered by Charlotte A. • Biology tutor
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Explain the hormones involved in the menstrual cycle from day 1-14 of the cycle.

FSH: FSH is released into the blood from the pituitary gland. It is triggered by a fall in progesterone at the end of the previous cycle. It acts upon the ovary, causing development of a follicle (eggs to ma...
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Answered by Ellie G. • Biology tutor
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