Coordination & Response

Question 1

Whats tropism?

Answer 1

A plants response to directional stimulus.

Question 2

Whats phototropism?

Answer 2

A plants response to light?(Stem shows positive phototropism. Roots show negative phototropism)

Question 3

Whats geotropism?

Answer 3

A plants response to gravity? (Stem shows negative phototropism. Roots show positive phototropism)

Question 4

What are auxins?

Answer 4

A plant hormone which causes the elongation of cells in shoots and is involved in regulating plant growth.

Question 5

How does auxin affect the stem?

Answer 5

In stems auxins concentrate on the side furthest from the light. This cell elongation causes the stem to bend towards the light.

Question 6

Whats a clinostate?

Answer 6

A mechanism that negates the effect of gravity or light.