Top answers

What is homeostasis?

Homeostasis is the maintenance of a constant internal environment in organisms despite external changes. Homeostasis ensures that cells within an environment are able to meet their needs and function appropr...
YB
Answered by Yinka B. • Biology tutor
4208 Views

What is a niche?

A niche is the functional area within which an organism exists. This can be a specific habitat it inhabits, how it shelters itself, a food source it can exploit and can include all abiotic or biotic interact...
TR
Answered by Thomas R. • Biology tutor
13815 Views

What is the difference between a virus and a bacteria? What is an example of each?

A virus is non-living and cannot be treated by antibiotics, they do not have a cell wall. Viruses are generally smaller and require a host to survive. A bacteria can be affected by antibiotics and can surviv...
TR
Answered by Thomas R. • Biology tutor
17810 Views

Describe how the action of the mouth, oesophagus and stomach contributes towards the digestion of food? (6 Marks)

As this question is worth 6 marks, 6 different points need to be made to get all the marks. These could be two from each structure that is given. The teeth in the mouth break down food into smaller pieces (1...
CM
Answered by Charlotte M. • Biology tutor
12540 Views

Cystic Fibrosis (CF) is a recessively inherited disorder. A father is a suffer of CF, while the mother is normal and not a carrier. What is the chance their child will be a carrier of CF? Give your answer as a percentage.

First write a key for the alleles. (normal Allele=T. CF allele=t) If the mother is normal= TT Father is a suffer =tt. Then Draw a punnet diagram for the child Write a key for the punnet diagram. TT-normal. T...
NI
Answered by Natasha I. • Biology tutor
2755 Views