Control Systems

Question 1

What are control systems

Answer 1

How plants respond to their environments when there is a change, this is called stimulus.

Tropism is a kind of response plants have to stimulus

Question 2

What are a few kinds of stimulus

Answer 2

Temperature
Chemicals
Water
Touch
Length of daylight hours
Light
Gravity

Question 3

What is phototropism and its 2 types

Answer 3

A plants response to light

Two types are:
Positive
Negative

Question 4

What is POSITIVE phototropism

Answer 4

Where a plant grows towards the light

example: leaves, stems, flowers

Question 5

What is auxin and what is it used in

Answer 5

A hormone that promotes cell growth, it occurs in positive phototropism

Question 6

What is NEGATIVE phototropism

Answer 6

Growth away from the light

example: roots

Question 7

What is gravitropism and its 2 types

Answer 7

A plants response to gravity

2 types are:
Positive
Negative

Question 8

What is the difference between positive and negative gravitropism

Answer 8

Positive - growth in the same direction as gravity (ex: roots)

Negative - growth in the opposite direction of gravity (ex: stem)