Top answers

What conditions increase the likelihood of fossilisation?

Cold and low oxygen - minimises likelihood of organisms decaying
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Answered by Katrina T. • Biology tutor
4723 Views

Explain the difference in the speed of conduction of an action potential along the length of a myelinated neurone and a non-myelinated neurone.

First, we need to explain how the action potential is conducted along the length of the axon. An action potential is transferred along an axon by the movement of Na + and K + ions into and out of the cell. T...
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Answered by Catherine H. • Biology tutor
9279 Views

How does eutrophication work?

Fertilisers containing nitrogen are washed from fields to rivers and ponds. 2. This effectively fertilises the algae in the pond causing an 'algal bloom'. 3. The layer of algae on the surface stops sunlight ...
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Answered by Iona H. • Biology tutor
4658 Views

How can you stop a cell culture from becoming contaminated?

Sterilising petri dishes and agar before use. Taping lid of petri dish whilst microbes are glowing. Sterilising innoculating loops before use.Carry out experiment near bunsen burner for updraft.
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Answered by Iona H. • Biology tutor
4136 Views

How are blood glucose levels controlled in the body?

When there is an excess of glucose in the blood (as there would be after eating a meal), the increase in blood glucose concentration is detected by the beta cells of the islets of Langerhans in the pancreas ...
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Answered by Elizabeth T. • Biology tutor
15818 Views