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Define the term 'phylogeny', how it is related to classification of species, and what kind of evidence is used in phylogenetics. (3 Marks)

Phylogeny is the evolutionary relationships between different species. Species within the same taxonomic group have shared phylogeny (i.e. they have a common ancestor). (1) Phylogeny is what taxonomic classi...
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Answered by Mary Y. • Biology tutor
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How does crossing over occur during meiosis?

Genetic variation is important because it allows natural selection to act on the population. Individuals that inherit advantagous alleles are more likely to survive and successfully reproduce. Crossing over ...
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Answered by Tamara A. • Biology tutor
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What makes up a DNA nucleotide?

-A phospate group -A hexose sugar (deoxyribose) -A nitrogenous base (A, G, C or T)
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Answered by Augusta T. • Biology tutor
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What are 2 functions of bile?

Bile is alkaline, so it neutralises the hydrochloric acid from the stomach. This creates the right pH for the enzymes working in the intestine. As well as this, bile is an emulsifier. It breaks up big drople...
MT
Answered by Megan T. • Biology tutor
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What do the coronary arteries do?

The coronary arteries supply the blood to the tissues of the heart, which is made up of cells called myocytes. In the body, the heart acts like a pump and contracts in order to force blood out into the rest ...
ZK
Answered by Zoya K. • Biology tutor
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