Why Can Scratching or Chipping the Seed Coat Speed Up

question 17

Multiple Choice

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)Water and oxygen can enter the seed to reach the embryo more quickly.
• C)Carbon dioxide can enter the seed and stimulate photosynthesis.
• D)Bacteria or fungi can enter the seed and release growth factors.