BIOMOLECULES AND ENZYMES

Detailed explanation-1: -Positive geotropism is when a part of a plant grows towards gravity. In response to gravity, the roots of a plant grow towards the earth and they set an example of positive geotropism whereas the stem grows away from the earth making it an example of negative geotropism.

Detailed explanation-2: -Roots are an example of positive geotropism.

Detailed explanation-3: -Hydrotropism. Hydrotropism is when plants grow towards, or away from water. This tends to happen in the roots, where plants absorb most of their water.

Detailed explanation-4: -As the roots always grow in the downward direction or in the direction of the force of gravity they are regarded as positively geotropic. The shoots of the plant grow against the force of gravity so, it is known to be negatively geotropic in nature.

Detailed explanation-5: -Examples of positive geotropism (a) Closing of flowers(b) Upwards growth of stem(c) Downwards growth of root(d) Lateral growth of root.