Top answers

How does the body's response to a second infection by a bacterial pathogen differ from the first? (3 marks)

faster response due to the presence of memory cells there are many more cells specific for this pathogen therefore clonal selection and expansion of B cells is quicker - antibody production is quicker theref...
BT
Answered by Beth T. • Biology tutor
3071 Views

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...
CD
Answered by Callum D. • Biology tutor
7775 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
8987 Views

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...
AM
Answered by Alec M. • Biology tutor
28876 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...
IN
Answered by Iona N. • Biology tutor
2892 Views