Adaptions ORGANISING ANIMALS AND PLANTS Flashcards
1
Q
How can the effectiveness of a material been improved for exchanging materials?
A
Large surface wares over which the exchange can take place.
A thin membrane or being thin to provide a short diffusion path.
Efficient blood supply
Being ventilated.
2
Q
How is the alveoli adapted?
A
It has an enournous surface area and a very rich blood supply. The villi also have a large surface area, short diffusion paths and a rich blood supply to make the exchange of materials more effective.
3
Q
How are the plant cells adapted?
A
Flat, thin leaves, the presence of air spaces in the leaf tissues and the stomata all help to provide a big surface area and maintain a steep concentration gradient for the diffusion of substances, such as water, mineral ions and carbon dioxide.
