science
Grade-4-
Easy
Question
Which is true about a plant’s response to gravity?
- Their stem grows upwards.
- Their roots grow downwards.
- Both a and b
- They are not affected by gravity.
Hint:
The things we observe in nature.
The correct answer is: Both a and b
The correct option is c) Both a and b.
We see this in everyday life, that the stem is erect and grows straight. Whereas the stem grows downwards. The stem shows negative geotropism, and the root shows positive geotropism.
Geotropism is the response of plants or part of plants towards different types of stimuli. The stimuli can be light, water or even gravity. There are two types of geotropism is positive geotropism and negative geotropism.
Positive geotropism is the response of plant or a part of it towards gravity and negative geotropism is the response of plant or a part of it away from gravity.
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