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Biology
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Describe how different environmental factors affect: the direction of growth of roots the direction of growth of shoots. In your answer you should refer to the role of plant hormones.

Here a thoroughly thought out response to the question should be formulated it is not enough to simply know the name and role of plant hormones within it.
Start with a factor, it is helpful to kn...

KH
5755 Views

What is Krebs cycle and what is its role in aerobic respiration

Krebs cycle is a series of reactions that take place in the mitochondria of most living cells and result in the production of energy during aerobic respiration. During Krebs cycle oxygen is metabolised...

AT
10554 Views

What is the role of Tropomyosin in myofibril contraction?

Tropomyosin helps to regulate myofibril contraction. Before contraction, tropomyosin covers the myosin binding sites on the actin molecule, preventing the myosin heads from binding. During contraction, ca...

LH
Answered by Laura H. Biology tutor
9413 Views

Why is sickle cell disease most common among people living in tropical regions, and their descendants?

Sickle cell disease is caused by a recessive allele of the haemoglobin gene. When two copies are present (i.e. it is homozygous), many red blood cells become sickle-shaped, leading to disease.

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SG
Answered by Sean G. Biology tutor
17011 Views

What are some good revision strategies?

Everyone has their own ways of remembering things, but there are some good general points that might help you out.

If you just read over things, you might find that you can...

GF
Answered by Gyda F. Biology tutor
3891 Views

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