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Plant growth caused by external stimulus is _____.

A. tropism
B. homeostasis
C. gibberllin
D. hormone

User Ieure
by
7.6k points

2 Answers

1 vote
tropism: the turning of all or part of an organism in a particular direction in response to an external stimulus.

so a
User Naveed Butt
by
8.8k points
1 vote

Answer: The correct answer for the blank is-

A. tropism.

Tropism is a biological process that indicates growth of a plant in a particular direction in response to any external stimuli (any change in the environment that induces a specific response in a biological system).

For example - Phototropism in plants is a type of tropism process in which plants tend to grow towards the direction of sunlight.

Thus, option A) is the right answer.

User Amhed
by
7.4k points
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