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Biology
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How does natural selection occur?

There are two important terms to understand (and state in an exam!) to answer this question. 1) Genetic diversity = the number of different alleles of genes

TW
Answered by Tess W. • Biology tutor
4586 Views

Why do insects and other animals need developed transport systems?

They have a high metabolic rateAs a result, they have a high oxygen and glucose demandDiffusion is not efficient alone as it is too far

FB
Answered by Freya B. • Biology tutor
4235 Views

Describe the sequence of events of the clotting cascade that will lead to a blood clot in a damaged blood vessel

Thromboplastin is released from damaged tissue and platelets, which activates an enzyme that catalyses the conversation of the protein prothrombin to thrombin. This occurs in the presence of Calcium and V...

LT
Answered by Laura T. • Biology tutor
4548 Views

What gives rise to antibiotic resistance?

Key pointsVARIATION: A population of bacteria aren't all identical, even having all derived from a single bacterium. Rapid genetic exchange gives rise to mutations. SELECTION PRESSURE: By adding th...

AS
Answered by Aman S. • Biology tutor
2597 Views

What are the basic life processes an organism must carry out to sustain life?

M - movementmovement is required in any organism to allow it to access the environment and sources of energyR - respirationenergy producing processes underlie metabolism in the organism required for chemi...

WQ
Answered by Wesley Q. • Biology tutor
2098 Views

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