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Biology

GCSE

What is mitosis?

Mitosis is the process of division of a single cell to create two identical daughter cells. It involves four distinct phases: prophase, metaphase, anaphase and telophase, followed by cytokinesis. Each of ...

Answered by Kerry R. • Biology tutor

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Mom has blood type A and father has blood type B. a) If mom has AA and dad B.B. genotype, determine their children’s genotype. b) If mom has AO and father has B.B. genotyoe, determine their children’s genotype and the likelihood.

If the mom has blood type A, her genotype could either be AA or AO. She has at least one copy of A allele.

If the father has blood type B, his genotype could either be BB or BO. He has at least on...

Answered by Maria Laura O. • Biology tutor

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Explain the importance of neurones and synapses in the reflex arc

The reflex arc is essential in producing a quick involuntary response aimed to prevent injury in an individual. In response to a stimulus (such as intense heat/fire), the sensory neuron detects this and t...

Answered by Hanin R. • Biology tutor

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Oxygen is exchanged between the blood capillaries and the tissues. Give two ways in which capillaries are adapted for exchanging blood with the tissues.

Thin walls for short diffusion path 2. Narrow, so have a large surface area to volume ratio

Answered by Leila G. • Biology tutor

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Describe how a synapse works

- An electrical impulse travels down the axon of a pre-synaptic neurone. - The movement of this electrical impulse initiates the release of chemical messengers which are...

Answered by Saira I. • Biology tutor

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