As a Seed Germinates,its Shoot Points Upward Toward Light,and Its

question 34

Multiple Choice

As a seed germinates,its shoot points upward toward light,and its root grows downward into the soil.Turn the plant sideways,and the stem and roots bend according to the new direction of gravity.How do roots and shoots grow in opposite directions as the plant is rotated?

• A)The roots and shoots respond to auxins,though in different directions.
• B)Statoliths move in the opposite direction in roots and shoots.
• C)The absorption of light occurs only in shoots.
• D)The circadian rhythms of roots and shoots are opposite.
• E)Differences in thigmotropism occur.

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