In which situation will positive geotropism be seen?
Answer and explanation
Correct answer: Root growing downward
The governing concept is geotropism, also called gravitropism. Positive tropism means growth in the direction of the stimulus. Gravity acts downward, and roots usually grow downward in response to it; therefore downward root growth is positive geotropism. Upward stem growth is generally negative geotropism, tendril coiling is related to touch, and pollen-tube growth toward an ovule is chemotropism. Hence option B is correct.
Frequently asked questions
What is the correct answer to this question?
Root growing downward
Why is this the correct answer?
The governing concept is geotropism, also called gravitropism. Positive tropism means growth in the direction of the stimulus. Gravity acts downward, and roots usually grow downward in response to it; therefore downward root growth is positive geotropism. Upward stem growth is generally negative geotropism, tendril coiling is related to touch, and pollen-tube growth toward an ovule is chemotropism. Hence option B is correct.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: World of Living. Topic: Control and Coordination.
