Top answers

How can genetically identical twins look different?

There are two key pieces of terminology that it is important to understand with this question; genotype and phenotype . All sexual organisms inherit a mix of genes from their parents. This mix - the genetic ...
JH
Answered by Josh H. • Biology tutor
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Is normal expiration, at rest, a passive or active process in a healthy individual? And why?

Expiration is a passive process. It happens due to relaxation, not contraction, of the muscles of the chest. As well as the elastic recoil of the lungs. Both of these processes do not require energy and henc...
SJ
Answered by Samuel J. • Biology tutor
10780 Views

By what process do plants move ions from the soil exterior to the plant, into the root cells of the plant?

Active Transport Normally soil ion concentrations will be low, and high in the root cells. The ions have to move up a concentration gradient and therefore requires an energy-using process to do so.
MT
Answered by Miss T. • Biology tutor
3611 Views

Name the three domains of life.

Archaea Bacteria Eukaryota
MT
Answered by Miss T. • Biology tutor
4778 Views

Describe the cardiac cycle (7 marks)

During diastole the atria and ventricles are relaxed. The atrioventricular valves are open and the semilunar valves are closed. Deoxygenated blood enters the right atrium from the venae cavae and oxygenated ...
TS
Answered by Tara S. • Biology tutor
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