BIOMOLECULES AND ENZYMES

BIOLOGY

HORMONES

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
When the root of a plant growing down, it is a ____
A
Positive geotropism
B
Negative geotropism
C
Thigmotropism
D
Hydrotropism
Explanation: 

Detailed explanation-1: -Geotropism: The movement or growth of the plant parts is towards the pull of gravity, it is known as positive geotropism. Example-Roots (grow downwards) Whereas if the movement of the plant parts is against or opposite to the pull of gravity, it is known as negative geotropism.

Detailed explanation-2: -Plant parts can grow with or against gravity. This type of tropism is called gravitropism. Roots of a plant grow downward and exhibit positive gravitropism. Stems, on the other hand, exhibit negative gravitropism since they grow upwards and against the force of gravity (see Figure 1).

Detailed explanation-3: -Plants responses to gravity: when the stem grows against the force of gravity, this is known as a negative geotropism. when a root grows in the direction of the force of gravity, this is known as a positive geotropism.

Detailed explanation-4: -The roots are exhibiting positive geotropism, or growth with gravity, while the stem is exhibiting negative geotropism, or growth against gravity.

Detailed explanation-5: -Have you heard of gravitropism? It’s the unique ability of plants to sense gravity, and respond accordingly. In other words, it’s how a plant knows to point its roots downward.

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