Top answers

How does an action potential travel between two neurones?

When an action potential reaches the end of one neurone, it cannot simply move to the next one as there is a gap (the synapse or synaptic cleft ) between the two neurones. Instead, when the action potential ...
AF
Answered by Alice F. • Biology tutor
3087 Views

What are the differences and similarities between eukaryotic and prokaryotic cells?

There are two types of cell called Eukaryotic cells and Prokaryotic cells. Eukaryotes are organisms made up of eukaryotic cells which include animals, plants and fungi (you can remember this as YOU are a EU-...
AF
Answered by Alice F. • Biology tutor
20534 Views

Describe the functional importance of the heart as a pump

The heart made up of four chambers; two atria at the top and two ventricles at the bottom. There are effectively two pumps. The pump on the right side of the heart sends blood to the lungs to be oxygenated. ...
EW
Answered by Emily W. • Biology tutor
4350 Views

Explain how the trunk of an elephant evolved using Darwin's theory of natural selection, and then Lamarck's theory.

According to Darwin's theory, genetic variation within the population means that some elephants are born with longer noses. Longer noses are better suited to the environment, so longer-nosed elephants are mo...
KP
Answered by Katie P. • Biology tutor
32339 Views

Explain the process of natural selection.

Mutation, meiosis and sexual reproduction causes variation amoung members of the same species. Species tend to produce more offspring than the environment can support leading to competition for food or preda...
JW
Answered by Jessica W. • Biology tutor
2891 Views