Co-ordination and response

Question 1

Homeostasis

Answer 1

The maintaining of a stable internal enviroment

Question 2

Stimulus

Answer 2

Change in the enviroment

Question 3

Phototropism

Answer 3

Plants response to light

Question 4

Geotrophism

Answer 4

Plants response to gravity

Question 5

Stems/Roots

Negative or positive phototropism?

Answer 5

Stem = Positive (Grows towards light)

Roots = Negative (Grows away from light)

Question 6

Stems/Roots

Negative or positive geotrophism?

Answer 6

Stem = Negative (Grow away from gravity)

Roots = Positive (Grow down in direction of gravity)

Question 7

Auxins

Answer 7

Plant hormones

Question 8

How plant stem may bend towards the light/sun?

Answer 8

Auxins concentrate on side of stem furthest from light source, causing cell elongation causing stem to bend towards light.

Question 9

Coleopeptides

Answer 9

Cereal seedlings, used to investigate trophisms

Question 10

Clinostate

Answer 10

Device used to remove any stimulus. E.g negates effect of gravity/light