Top answers

Distinguish between the structure of plant and animal cells

A number of differences exist between the structure of animal cells and plant cells. The most prominent difference is the presence of both cell walls and cell membranes in plants, while animal cells only hav...
JK
Answered by Joanna K. • Biology tutor
3336 Views

Describe how water, ions and sugar are obtained and transported through plants.

Water Water is obtained from the soil into the roots of the plant. This occurs via osmosis , which is the movement of high water potential to low water potential [alternatively, from an area of low to high c...
OH
Answered by Olivia H. • Biology tutor
8553 Views

Explain how meiosis promotes genetic diversity

Meiosis occurs to produce haploid gametes required for sexual reproduction. It promotes genetic diversity in 3 different ways: crossing over, independent assortment and random fertilisation.Crossing over occ...
JA
Answered by James A. • Biology tutor
8312 Views

Describe how different types of blood vessel are structurally adapted for their purpose.

Arteries , carrying blood away from the heart have a thick muscular wall that is more elastic than fibrous tissues. This is elastic to cope with the high fluid pressure in the lumen and allows distention and...
DH
Answered by Digby H. • Biology tutor
3501 Views

How does the lock and key mechanism help enzymes to increase the rate of substrate reactions in the body?

Enzymes are proteins that typically help to increase the rate of specific reactions in the body, each enzyme is specific to one or two substrates meaning that different enzymes help to increase the rate of d...
SW
Answered by Sophie W. • Biology tutor
7230 Views