Top answers

How does genetic variation occur in meiosis?

There are three ways that the cells produced in meiosis are different from each other and from the parent cells:1) Independent assortment: this is the idea that during metaphase 1 and 2 pairs of homologous c...
AL
Answered by Amy L. • Biology tutor
8475 Views

How do I tackle questions that seem only vaguely related to the course I've covered?

These questions are particularly stressful, because they seem completely random. But the most important thing to do is relax and think back to your syllabus. Can you make any links to the topic at hand and s...
JS
Answered by Juliet S. • Biology tutor
2851 Views

Explain how an action potential is propagated across a synapse in a muscles (3 marks)

Any three of the following, in the correct order. Action potential arrives at the pre-synaptic membrane Causes the voltage gated Ca2+ channels in the pre synaptic terminal to openCa2+ enters the pre synaptic...
Answered by • Biology tutor
2751 Views

Why does the haemoglobin dissociation curve shift to the right when an individual exercises.

The concentration of carbon dioxide in a persons bloodstream rises during exercise. The carbon dioxide molecules interact with substances in the bloodstream to form carbonic acid. This causes the blood to be...
Answered by • Biology tutor
3766 Views

Describe the structure of an antibody and relate it to it's function.

An antibody is a Y shaped protein which has a constant region and a variable region . The variable region of an antibody is of a complementary shape to a specific pathogenic antigen and this allows the antib...
LR
Answered by Laila R. • Biology tutor
15192 Views