GENERAL HISTOLOGY

INTEGUMENTERY SYSTEM

INTEGUMENTERY SYSTEM MISCELLENOUS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Identify the stimulus ____ “Roots growing down towards gravity”
A
Roots growing down
B
The force of gravity
C
Either A or B
D
None of the above
Explanation: 

Detailed explanation-1: -Geotropism is a type of tropism where plants show some growth in response to gravity. Roots growing downwards is an example of geotropism.

Detailed explanation-2: -In a root placed horizontally, the bottom side contains more auxin and grows less-causing the root to grow in the direction of the force of gravity. This is just like phototropism, in that auxin in the root inhibits growth and auxin in the stem promotes growth.

Detailed explanation-3: -Geotropism: Response to gravity It is the movement of plant parts in response to gravity. The roots grow towards gravity and are hence called positively geotropic.

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