Question

The first part of the plant to emerge from a sprouting seed is the root. If the seed is planted upside down, the root will first grow upward. Then it will turn and grow downward. What kind of response is this?

Gravitropism


Hydrotropism


Phototropism


Thigmotropism

Answer 1

The correct response to this question is Gravitropism.

Step-by-step explanation:

Gravitropism is the directional growth response of plants to the force of gravity. When a seed is planted, the root of the plant grows downward and the shoot grows upward, even in darkness. If the seed is planted upside down, the geotropic response of the root causes it to grow upward initially, against gravity, until it senses the pull of gravity and then it will turn and grow downward. This process is known as negative gravitropism as the root grows against the direction of gravity at first, but eventually turns to grow in the correct direction.