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Biology
GCSE

Describe how selective breeding could be used to improve the volume of milk produced by cows.

Calculating the milk yield of mother cows and their offspring can indicate which animals have good breeding genetics. Bulls also play an important role in generating a good milk yield, and their offspring...

Answered by Saffron M. Biology tutor
9380 Views

Describe, with the use of an example, the process of natural selection in evolution.

An example could be the peppered moth which changed its colour in order to blend into the environment as it changed with the industrial revolution.Should explain that natural selection is where advantageo...

Answered by Rose B. Biology tutor
2362 Views

Give 2 differences between an animal and a plant cell.

Any 2 from: Plant cells have; cell wall (1), large vacuole (1), chloroplast (1) Animals cells are more irregular in shape, plant cells are more rigid and rectangular (1)


Answered by Sarina G. Biology tutor
1980 Views

Describe the process of breathing

The diaphragm contracts, moving downwards. The external intercostal muscles contract, and the internal intercostal muscles relax. Pressure in the chest cavity decreases, forcing air into the lungs. The di...

Answered by Ailin C. Biology tutor
2246 Views

What are the key steps in DNA replication during the S-phase of the cell cycle?

The enzyme DNA helicase 'unzips' the double helix DNA structure but disrupting the hydrogen bonds between the bases. This forms a replication fork that becomes the template for replication.Replication the...

Answered by Natasha E. Biology tutor
3182 Views

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