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Biology
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What is a catalyst?

A substance which increases the rate of a reaction without being consumed

Answered by Biology tutor
1993 Views

How does atherosclerosis form?

Atherosclerosis occurs as a result of damage to the endothelial lining of blood vessels. Once the damage has occurred, the body induces an inflammatory response, causing ...

DG
Answered by Daniella G. Biology tutor
3070 Views

Explain one way in which starch molecules are adapted to its function in plant cells

Starch molecules are insoluble and therefore don't affect the water potentialThey are also large and therefore can't leave the cellThey are compact and c...

Answered by Biology tutor
13969 Views

How does phagocytosis occur in macrophages?

A macrophage attaches to a pathogen by the receptors on the pathogen and macrophage binding. The pathogen is then engulfed and a phagosome forms, where a vesicle surrounds the pathogen. A lysosome moves t...

HM
Answered by Hamza M. Biology tutor
2079 Views

Explain how evolution by natural selection brings about changes in a species ?

Variation is present in a population, this can either be genetic variation or due to mutations. A selectional pressure causes a stuggle for existance. Selectional pressures can come from a predator, disea...

MS
Answered by Martina S. Biology tutor
2671 Views

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