Why can scratching or chipping the seed coat speed up the germination of hard-coated seeds like alfalfa?
A. The mechanical stress activates hydrolytic enzymes.
B. Carbon dioxide can enter the seed and stimulate photosynthesis.
C. Water and oxygen can enter the seed to reach the embryo more quickly.
D. Damage to the seed coat triggers the aleurone layer to release amylase.
E. Bacteria or fungi can enter the seed and release growth factors.
Answer: C
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