Coordination & Response Flashcards
1
Q
Whats tropism?
A
A plants response to directional stimulus.
2
Q
Whats phototropism?
A
A plants response to light?(Stem shows positive phototropism. Roots show negative phototropism)
3
Q
Whats geotropism?
A
A plants response to gravity? (Stem shows negative phototropism. Roots show positive phototropism)
4
Q
What are auxins?
A
A plant hormone which causes the elongation of cells in shoots and is involved in regulating plant growth.
5
Q
How does auxin affect the stem?
A
In stems auxins concentrate on the side furthest from the light. This cell elongation causes the stem to bend towards the light.
6
Q
Whats a clinostate?
A
A mechanism that negates the effect of gravity or light.
