BOTANY

Detailed explanation-1: -Geotropism is a type of tropism where plants show some growth in response to gravity. Roots growing downwards is an example of geotropism.

Detailed explanation-2: -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. The reason plants know which way to grow in response to gravity is due to amyloplasts in the plants.

Detailed explanation-3: -The response or the movement of the plant parts towards the force of gravity is called geotropism. The downward growth of roots towards the pull of gravity is called positive geotropism.

Detailed explanation-4: -Plants respond directly to Earth’s gravitational attraction, and also to light. Stems grow upward, or away from the center of Earth, and towards light. Roots grow downward, or towards the center of Earth, and away from light.

Detailed explanation-5: -Gravitropism. Plant parts tend to either grow in the same direction as gravity, or in the opposite direction. This type of tropism is called gravitropism. For example, the roots of most plants exhibit positive gravitropism when they grow downward.