Photosynthesis

Question 1

What do plants suffer if they do not have enough mineral ions from the soil?

Answer 1

Deficiency issues.

Question 2

Why are nitrates needed?

Answer 2

Nitrates are needed to make proteins and for growth. A lack of nitrates leads to stunted growth.

Question 3

What are magnesium ions needed for?

Answer 3

Magnesium ions are required to produce chlorophyll and thus for photosynthesis. Without these ions plants can suffer from chlorosis and suffer from yellow leaves.

Question 4

What sort of diseases can plants suffer from?

Answer 4

Viral, Bacterial, Fungal pathogens.

Question 5

Signs of plant disease.

Answer 5

Abnormal growth, spots on the leaves, rot or decay, stunted growth, malformed stems or leaves, discolouration.

Question 6

Physical Defences

Answer 6

Waxy Cuticle(barrier to stop pathogens from entering)
Cell wall(Another barrier)
Layer of dead cells (surrounds the stem acting as a barrier against pathogens)

Question 7

Chemical Defences.

Answer 7

Posions: Deters herbivores from eating the plants e.g. Fox Glove
Antibacterial: used to kill bacteria e.g. Mint plant