Question

Primary root is
a) Positively geotropic
b) Positive hydrotropic
c) Negative geotropic
d) Negative hydrotropic

Answer 1

The root is a plant component that aids in the plant's security. It is the most important part of the plant because it provides sustenance and water from the soil by retaining it. It comes in two varieties: taproot and unusual root. The roots may also be present in the plant as a means of adaptation.

Complete answer:
Geotropism is a phenomenon in which plant development is influenced by the planet's gravitational pull. Gravity exerts its influence in a downward direction. The plant part that fills toward the power is considered to be decidedly geotropic, whereas the plant part that becomes inverse to the power of gravity is considered to be adversely geotropic in nature. The roots are regarded as emphatically geotropic because they consistently fill the descending way or toward the power of gravity. Because the plant's shoots develop against gravity, it is known to be contrarily geotropic in nature.
Hydrotropism is a phenomenon in which the plant root develops in response to the presence of dampness in the soil or in the opposite direction. When the roots develop toward the presence of dampness content, they are said to be decidedly hydrotropic, and when they develop away from the dampness content, they are said to be contrarily hydrotropic.

In this case, the correct response is A-'Positively geotropic'.

Note:
The roots grow downward and have a positive geotropism. A few roots that grow away from the soil are known to be geotropically unfavourable. The roots find their way by being drawn in by the dampness content of the soil. This assists them in expanding their region for supplement ingestion.