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Explain the role of inorganic ions in the body.

The resting membrane potential of cells is maintained by the actions of Na+ and K+. A resting cell is impermeable to Na+ so the concentration of Na+ is greater outside the cell than in it. However the cell i...
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Answered by Callum D. • Biology tutor
7912 Views

During succession the species present changes. Explain why.

The pioneer species (or any other species) changes the environment, making it less hostile. Also some species are better competitors and out-compete others.
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Answered by Alfie B. • Biology tutor
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How is structure relevant to enzyme function?

Enzymes are functional proteins which are used to catalyse reactions. They all exhibit primary, secondary and tertiary structure, and some which have more than one polypeptide chain have quaternary structure...
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Answered by Alec M. • Biology tutor
29058 Views

How do plants alter the way in which they grow in response to light?

Plants have photoreceptors in the tips of their shoots. If light is detected from a specific direction, the plant will produce auxins which diffuse fown the shoot of the plant. The auxins increase in concent...
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Answered by Iona N. • Biology tutor
2968 Views

In a population of deer there are two alleles, p and q. Individuals with allele p are faster than those with allele q and so are better at avoiding predation by wolves. Explain how natural selection will affect the characteristics of the deer population.

In the population, there is genetic variation with some individuals possessing allele p and some possessing allele q. Predation by wolves acts as a selection pressure on the genetic variation in the populati...
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Answered by Harrison O. • Biology tutor
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