In which situation will negative geotropism be seen?
Answer and explanation
Correct answer: Stem growing upward
The governing concept is negative geotropism, or negative gravitropism. Negative tropism means growth away from the direction of the stimulus. Since gravity acts downward, the stem or shoot growing upward is growing opposite to gravity and therefore shows negative geotropism. Root growth toward water is hydrotropism, tendril bending is a touch response, and pollen-tube growth toward a chemical signal is chemotropism. Thus option B is correct.
Frequently asked questions
What is the correct answer to this question?
Stem growing upward
Why is this the correct answer?
The governing concept is negative geotropism, or negative gravitropism. Negative tropism means growth away from the direction of the stimulus. Since gravity acts downward, the stem or shoot growing upward is growing opposite to gravity and therefore shows negative geotropism. Root growth toward water is hydrotropism, tendril bending is a touch response, and pollen-tube growth toward a chemical signal is chemotropism. Thus 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.
