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11 votes
11 votes
The growth of plant seedlings is usually

A.phototropic and gravitropic
B.thigmotropic and gravitropic
C.phototropic and influenced by ethylene
D.gravitropic and influenced by ethylene

User Dave Long
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1 Answer

15 votes
15 votes

Answer:

The correct answer is - A. phototropic and gravitropic.

Step-by-step explanation:

A plant seedling grows usually two-direction shoots or stems towards light and roots towards the soil or in the direction of gravity. The movement of the plant toward a specific stimulus or effect parts is called tropism and different parts move in a different direction.

The movement of the roots of the plant is usually towards the direction of soil or gravity and this is called gravitropic. The shoot or stem grows from the seedling towards the direction of light and it is called phototropic.

User Yuri Ghensev
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