Thigmotropism

Question 1

What is thigmotropism?

Answer 1

Is a plant response to contact with a solid object

Question 2

Give example of thigmotropism??

Answer 2

Tendrils of vines climb and grow around structures

Question 3

What are tendrils?

Answer 3

Are modified stem that allow the plant to use the support of external objects or other plants

Question 4

What are the hormones causing thigmotropism?

Answer 4

Auxins (IAA) and ethylene.

Question 5

T or F: Thigmotropism is plant response to contact with a solid object.

Answer 5

T

Question 6

T or F:Tendrils are modified root.

Answer 6

F

Question 7

T or F:Hormones responsible for thigmotropism are auxins and gibberellins.

Answer 7

F

Question 8

T or F: A tendril supports growth upward or outward.

Answer 8

T

Question 9

Give examples for plant responses to touch?

Answer 9

• Venus fly trap
• mimosa

Question 10

The leaf can be triggered In 2 ways?

Answer 10

• Mechanically due to loss of turgor
• electrochemically stimulated.

Question 11

What’s the average time taken for flytrap close?

Answer 11

0.3 s

Question 12

How does mimosa adapt to stimulus?

Answer 12

Close its leaflets when touched or exposed to heat.