© examsnet.com
Question : 7
Total: 10
Name the parts (a) to (e) in the following diagram.
OR
(a) What is tropism?
(b) How do auxins promote the growth of a tendril around a support?
What is the term given to the sequence of events occurring in the diagram ?
OR
(a) What is tropism?
(b) How do auxins promote the growth of a tendril around a support?
Solution:
(a) Receptors
(b) Sensory neuron
(c) Spinal cord (CNS)
(d) Relay neuron
(e) Motor neuron
Reflex arc is the term given to the sequence of events occurring in the diagram.
OR
(a) When the direction of external stimulus decides the direction of response in the form of growth it is called tropism. Thus, tropism is the directional growth movement of a plant part. It can be in the direction of the stimulus or away from the stimulus.
(b) Auxin is a plant growth hormone which is synthesized at the tip of the shoot. It helps the cell grow longer. When a tendril comes in contact with a support, auxins stimulates faster growth of the cells on the opposite side that's why the tendril forms a coil around the support and in this way auxins promote the growth of the tendril around a support.
(b) Sensory neuron
(c) Spinal cord (CNS)
(d) Relay neuron
(e) Motor neuron
Reflex arc is the term given to the sequence of events occurring in the diagram.
OR
(a) When the direction of external stimulus decides the direction of response in the form of growth it is called tropism. Thus, tropism is the directional growth movement of a plant part. It can be in the direction of the stimulus or away from the stimulus.
(b) Auxin is a plant growth hormone which is synthesized at the tip of the shoot. It helps the cell grow longer. When a tendril comes in contact with a support, auxins stimulates faster growth of the cells on the opposite side that's why the tendril forms a coil around the support and in this way auxins promote the growth of the tendril around a support.
© examsnet.com
Go to Question: