Top answers

How may cells be specialised to their function?

Despite animal cells all having a nucleus (for genetic information storage and reproduction), a cytoplasm (for structure), mitochondria (for aerobic respiration), ribosomes (for protein synthesis) and a cell...
AM
Answered by Alec M. • Biology tutor
17556 Views

Describe how a new phenotype may arise in the population and increase in frequency using the theory of natural selection.

A mutation arises in an individual that confers a selective advantage. The phenotype the mutation produces is selected for by natural selection and so the individual survives to reproductive age. This mutati...
KA
Answered by Katy A. • Biology tutor
2846 Views

Name and briefly describe the function of three organelles possessed by a plant cell. State an organelle that is present in a plant cell but not in an animal cell.

Plant cells possess a membrane bound nucleus that acts as the control centre of a cell. They also possess a vacuole which controls water balance in the cell. The chloroplasts are the site of photosynthesis a...
KA
Answered by Katy A. • Biology tutor
4073 Views

How do antibodies work?

Foreign cells that enter the body have antigens on the outside of them which will be complementary to a specific antibody. The antibody can bind to the antigen, forming an antigen-antibody complex, and this ...
LB
Answered by LORNA B. • Biology tutor
8224 Views

Can you explain to me the difference between diffusion, osmosis and active transport?

The key thing here is to note that both diffusion and osmosis are passive processes, and active transport is an active process. A passive process is one which does not require any energy in order to occur, a...
LR
Answered by Lizzie R. • Biology tutor
29591 Views