The tree may have adapted to a lack of water by making fewer leaves. How has the giraffe adapted to eat the leaves?

Explain why phospholipid molecules form a bilayer. (3 marks)

Which event would lead to primary succession of a forest?

Give two examples of what would occur if one of the pairs did not match or had an extra chromosomes. explain how this might occur, and if it would be dangerous to the individual. fast.