[OLD] Survival - Exam Questions

Question 1

Give one similarity and one different between a taxis and a tropism.

Answer 1

Similarity - they are both directional responses to directional stimuli.
Difference - tropism growth whereas taxis is movement.

Question 2

Suggest how IAA could have cause a horizontally growing root to grow downwards. (2)

Answer 2

Higher concentration of IAA on lower side.

Cells on upper side grow faster.

Question 3

Suggest an advantage for taxes or kineses.

Answer 3

Possible answers: avoid competition, avoid predators, find food, produce new colonies / disperse, optimum temperature etc.