BIOLOGY
HORMONES
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Positive geotropism
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Negative geotropism
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Thigmotropism
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Hydrotropism
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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.