coordination and response

Question 1

positive phototropism

Answer 1

shoot grows upwards and towards the light and away from gravity

Question 2

why plants phototropism

Answer 2

so leaves get more sulight

Question 3

positive geotropism
negative phototropism

Answer 3

shoot grows towards gravity and away from the sun
grows downwards

Question 4

why plant geotropic

Answer 4

so they can anchor their roots to try absorb more mineral ions and water

Question 5

auxins what and where

Answer 5

made in tips of shoots + roots and diffuse down to areas where cells division takes place

shoots - auxins promote cell elongation - growth
roots - inhibit cell elongation - less growth

Question 6

auxins and gravity

Answer 6

shoots/roots placed on side
1. due to gravity auxins accumulate on lower sides
2. lower side has a high auxin gradients then upper side
3. lower side grows faster and upwards
4. upper side grows lower and downwards

Question 7

auxins and phototropism all direction

Answer 7

light shines all around shoot from all directions
auxins evenly distributed around plant
cells in shoot grow at the same rate

Question 8

auxins and phototropism one direction

Answer 8

light shines on side of plant
auxin focus on shady side
shady side has more auxins so grows faster and upwards the sunny side
unbalanced
shady side bends to direction of sunlight