Additional: Tropisms (Unit 304)

Question 1

What is etiolation?

Answer 1

It is a growth response caused by the absence of light.

Question 2

How do stems behave during etiolation, and why?

Answer 2

The stems get rapidly longer; they’re more likely to reach light.

Question 3

What are tropisms?

Answer 3

Tropisms are unique characteristics plants can have that allow them to adapt to their environment.

Question 4

Difference between positive and negative tropisms?

Answer 4

Tropisms can be positive (toward the stimulus) or negative (away from the stimulus).

Question 5

What are the 4 main types of tropism?

Answer 5

• Phototropism
• Geotropism
• Hydrotropism
• Thigmotropism

Question 6

Phototropism?

Answer 6

Response to light

Question 7

Geotropism?

Answer 7

Response to gravity

Question 8

Hydrotropism?

Answer 8

Response to water

Question 9

Thigmotropism?

Answer 9

Response to touch