Top answers

What is homeostasis?

Homeostasis can be defined as the maintenance of a constant internal environment despite various stresses in the external environment which may act to alter this stable state. The stable state that the body ...
EB
Answered by Emma B. • Biology tutor
4209 Views

How do I test for the presence of starch in food?

The iodine test - use a dropper to apply a little iodine onto a small sample of the food. If starch is present, the iodine will change colour from orange/brown to blue/black.
AP
Answered by Anastasia P. • Biology tutor
11338 Views

What is osmosis?

This involves water molecules which are transported from an area of high concentration to a low concentration. This transportation is termed diffusion. This would occur through a partially permeable membrane.
DT
Answered by Devina T. • Biology tutor
3452 Views

List some of the concerns around in utero genetic testing

There is a risk to the health of the fetus There is a risk to the health of the mother There is a risk that this could lead to an abortion/miscarriage There is a risk that it could lead to "designer bab...
JC
Answered by Jack C. • Biology tutor
2982 Views

What is a pathogen?

A microorganism that causes disease
ES
Answered by Emma S. • Biology tutor
3266 Views