Top answers

What causes the condition Cystic Fibrosis?

Cystic Fibrosis is caused by a mutation in the CFTR gene. The mutation causes a small change in the DNA's base sequence which codes for a different sequence of amino acids and therefore as a result, the prot...
YM
Answered by Yasmin M. • Biology tutor
6065 Views

How are leaves of a plant adapted to enable photosynthesis?

Leaves have 4 main adaptations which enable them to carry out photosynthesis successfully. 1) Thin - this allows carbon dioxide to easily diffuse into the leaf cells 2) Transparent epidermis - this allows li...
RG
Answered by Rebecca G. • Biology tutor
15678 Views

Explain what is meant by 'homeostasis' and give an example of this process in the human body.

Homeostasis is the process of maintaining a constant internal environment in the body. An example of this is maintaining the temperature of the body. Human body temperature must be maintained at 37ºC as this...
OW
Answered by Oli W. • Biology tutor
24490 Views

What is 'survival of the fittest?'

1. What is ‘survival of the fittest’? - ‘Survival of the fittest’ is a phrase way to describe the principle behind the theory of evolution by natural selection, originally proposed by Charles Darwin in 1859 ...
RK
Answered by Radoslaw K. • Biology tutor
21217 Views

How are different species formed?

For a new species to form, first 2 groups of animals or plants must become physically spearated to form 2 different groups. Each group will have genetic variation within the group meaning that there is a wid...
SR
Answered by Susannah R. • Biology tutor
4484 Views