A stem grows upward and a root grows downward. What will their responses to gravity be called in the same plant?
Answer and explanation
Correct answer: Stem negative and root positive geotropism
The governing rule is that positive geotropism means growth in the direction of gravity, whereas negative geotropism means growth opposite to gravity. Gravity acts downward. The root grows downward and therefore shows positive geotropism; the stem grows upward and therefore shows negative geotropism. Hence option B is correct. The other choices either reverse the signs or name responses to light or chemicals.
Frequently asked questions
What is the correct answer to this question?
Stem negative and root positive geotropism
Why is this the correct answer?
The governing rule is that positive geotropism means growth in the direction of gravity, whereas negative geotropism means growth opposite to gravity. Gravity acts downward. The root grows downward and therefore shows positive geotropism; the stem grows upward and therefore shows negative geotropism. Hence option B is correct. The other choices either reverse the signs or name responses to light or chemicals.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: World of Living. Topic: Control and Coordination.
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