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Explain the process of evolution by natural selection

Variation in the population occurs through mutations. Some organisms have advantages that allow them to survive the selective pressure (thus could be Food shortage or predators) Survivors reproduce and pass ...
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Answered by Tamara S. • Biology tutor
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What hormone is involved in the function of the collecting duct in the nephron to retain water?

Recall that the primary hormone involved in water retention is anti- DIURETIC- hormone (ADH). If your rember that diuretic means increased loosing water through urination then you will know that the function...
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Answered by Catharina M. • Biology tutor
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For a dihybrid cross, how do you find out what proportion of offspring are expected to have a certain genotype?

The first step in tackling this is drawing a genetic diagram (which I would draw on the whiteboard). Say we are looking at a cross between two parents with genotype AaBb, so the cross would look like AaBb x ...
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Answered by Dan M. • Biology tutor
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What is Glycolysis?

Glycolysis is the first stage of aerobic and anaerobic respiration. Glycolysis occurs in the cytoplasm of a cell as glucose can't pass the mitochondrial membranes and the enzymes needed for its breakdown are...
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Answered by Adam J. • Biology tutor
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What main features are there in animal and plant cells? What functions do these elements serve?

Features/organelles present in both animal and plant cells include: the nucleus (where the DNA/genetic information is stored - this controls the activities of the cell), the cell membrane (a thin containing ...
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Answered by Phoebe W. • Biology tutor
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