Question

in order for germination to occur, seeds need water. which of the following is not a benefit of water to a growing seed?
a water activates enzymes in the seed
b water is necessary for the seed to perform photosynthesis
c water will cause its cells to swell
d water helps break the seed coat
e water helps the seed release its food

question 2
gravitropism causes roots to grow down and the shoots to grow up.
a true
b false

question 3
roots demonstrate _______ gravitropism.
a positive
b negative
c neutral

Explanation:

Question 1

To determine the incorrect benefit of water to a growing seed, we analyze each option:

• Option A: Water activates enzymes in seeds, which is correct as enzymes need water to function during germination.
• Option B: Seeds do not perform photosynthesis. Photosynthesis occurs in plants with leaves and chlorophyll, and seeds rely on stored food. So this is not a benefit of water to a seed.
• Option C: Water causes seed cells to swell (imbibition), which is essential for germination, so this is correct.
• Option D: Water helps break the seed coat (by swelling the seed), so this is correct.
• Option E: Water helps in mobilizing stored food in the seed, so this is correct.

Gravitropism (or geotropism) is the growth response of a plant to gravity. Roots show positive gravitropism (grow downwards) and shoots show negative gravitropism (grow upwards). So the statement "Gravitropism causes roots to grow down and the shoots to grow up" is true.

Positive gravitropism is growth in the direction of gravity. Roots grow downwards (towards gravity), so they demonstrate positive gravitropism. Negative gravitropism would be growth against gravity (like shoots), and neutral is not a term for gravitropism in this context.

Answer:

B. Water is necessary for the seed to perform photosynthesis

Question 2