Top answers

Describe how blood vessels are able to assist in the control of body temperature.

If body temperature is too high: Capillaries dilate, increasing the blood supply to the skin and allowing heat to be lost from the body by radiation. If body temperature is too low: Capillaries constrict, re...
MW
Answered by Merrin W. • Biology tutor
4783 Views

What is Natural Selection?

Natural Selection is the accepted theory of evolution first postulated by Charles Darwin and can be thought of as 'survival of the fittest'. It is the process by which a species gradually evolves through tim...
EW
Answered by Ellie W. • Biology tutor
6277 Views

How does the structure of the red blood cell allow it to carry out its functions?

The main function of the red blood cell is transport oxygen around the body to other cells. It contains haemaglobin which allows the binding of oxygen. Its biconcave shape maximises the surface area to incre...
NI
Answered by Narumi I. • Biology tutor
86791 Views

What's the difference between an animal cell, a plant cell and a bacterial cell?

There are a few differences that you can use to tell apart or describe these types of cells. The first distinguishing feature is whether the cell is eukaryotic or prokaryotic - this helps to separate bacteri...
AW
Answered by Azelie W. • Biology tutor
44080 Views

What is the difference between a macrophage and a monocyte?

Macrophages are simply monocytes that reside in tissues, rather than blood. In histology, monocytes appear bean shaped, whereas macrophages are just large with fluffy edges.
AS
Answered by Alec S. • Biology tutor
22083 Views