Unit 3 past paper questions Flashcards
1
Q
Describe the energy change that takes place during the first stage of photosynthesis
A
Light energy is converted into chemical energy
1
Q
explain why competition in ecosystems occur
A
Because resources are limited
2
Q
Name the product of carbon fixation that is converted to starch
A
sugar
3
Q
name a substance that enters the leaf through stomata
A
carbon dioxide
4
Q
Describe the advantages of using biological control of pests to increase food supply
A
5
Q
name the process by which new alleles are produced
A
mutation
6
Q
plants absorb nitrates from the soil which substances are first synthesised from these nitrates by plant cells
A
amino acids
