Tropic Response

Question 1

What is tropisms?

Answer 1

Tha way the plants respond to stimuli such as light or gravity

Question 2

What is gravitropism

Answer 2

Grwith response to gravity

Question 3

Gravitropism-

Roots are positively or negatively gravitropic positioned

Answer 3

Positively positioned

Question 4

Why are roots positively positioned

Answer 4

Grom downwards absorb mineral& water

Grow the same direction as the stimilus

Question 5

Shoots are negatively/positively positioned?

Answer 5

Negatively positioned

Question 6

Why are the shoots nrgatively positioned

Answer 6

Grow upwards- to sunlight

Question 7

What is auxin?

Answer 7

A hormone

Question 8

What does auxin do?

Answer 8

Plant hormone which controls growth

Question 9

What does auxin do in shoots?

Answer 9

Stimulates growth- cells elongate

Question 10

What does AU do in roots?

Answer 10

Inhibits growth- slowing cell elongation

Question 11

What happens when auxin in shoot?

Answer 11

AU builds up on the lowest side

Stimulates the cells to elongate- grow on lower side_ BEND UPWARDS

Question 12

What is phototropism?

Answer 12

Plants respond to light

Question 13

What is positevely phototropic

Answer 13

Shoots- grow upwards for sunlight

Question 14

Advantage of phototropism

Answer 14

Leaves expose the max surface srea to light

Question 15

What are synthetic plant hormones?

Answer 15

Selective weedkillers

Question 16

Name of the pesticide similar to auxins

Answer 16

2,4-D

Question 17

What does 2,4-D do?

Answer 17

Causes uncontrolled growth in plants

The ones affected grow too fast and die

Question 18

Which plang affected by 2,4- D and why.

Answer 18

Weeds

Wide leaves-absorb auxin-die

Question 19

Cropl plants not affected by auxin why?

Answer 19

Narrow leaves-auxin run off