BIOMOLECULES AND ENZYMES

BIOLOGY

HORMONES

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Shoots, stems, and leaves growing up away from the earth is an example of ____
A
negative geotropism
B
positive geotropism
C
positive thigmotropism
D
negative geotropism
Explanation: 

Detailed explanation-1: -In shoots, which are the stems and leaves of plants, auxin does the opposite: it promotes growth on the bottom of the cell and inhibits it on the top of the cell, causing the shoot to grow upwards. This is known as negative geotropism, because the growth goes against the pull of gravity.

Detailed explanation-2: -The movement of plant stem away from the soil in the upward direction is an example of negative geotropism.

Detailed explanation-3: -For example, the shoot of the plant shows negative geotropism whereas the roots of the plants show positive geotropism.

Detailed explanation-4: -The roots grown downward in the direction of gravity, which is positive gravitropism, and the shoot grows upward away from gravity, which is negative gravitropism.

Detailed explanation-5: -Geotropism is the movement or growth of plant parts in response to the force of gravity. Stems of the plant show negative geotropism while the roots show positive geotropism.

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