Water is required for seed germination to take place because it
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Correct Answer: Option A
Explanation:
The correct answer is A: activates the enzymes.
Water is essential for seed germination because it activates enzymes that are responsible for breaking down stored nutrients in the seed, which are necessary for the growing plant. This process helps provide energy for the developing embryo.
Here’s why the other options are incorrect:
- B: softens the testa: While water does help soften the seed coat (testa), this is not the primary reason for germination to take place. It is a secondary factor that aids in the process.
- C: liberates energy for growth: Water is involved in providing the conditions for the enzymes to activate, but it does not directly liberate energy. Energy is released from stored nutrients through enzymatic action, which requires water.
- D: permits radicle growth: While water is necessary for the radicle (embryonic root) to grow, its main function is activating enzymes that break down stored food, which in turn supports growth.
- E: allows oxygen to diffuse into the seed: Oxygen is important for respiration, but water itself doesn't directly facilitate the diffusion of oxygen. Water mainly supports the activation of metabolic processes.
The correct answer is A: activates the enzymes.
Water is essential for seed germination because it activates enzymes that are responsible for breaking down stored nutrients in the seed, which are necessary for the growing plant. This process helps provide energy for the developing embryo.
Here’s why the other options are incorrect:
- B: softens the testa: While water does help soften the seed coat (testa), this is not the primary reason for germination to take place. It is a secondary factor that aids in the process.
- C: liberates energy for growth: Water is involved in providing the conditions for the enzymes to activate, but it does not directly liberate energy. Energy is released from stored nutrients through enzymatic action, which requires water.
- D: permits radicle growth: While water is necessary for the radicle (embryonic root) to grow, its main function is activating enzymes that break down stored food, which in turn supports growth.
- E: allows oxygen to diffuse into the seed: Oxygen is important for respiration, but water itself doesn't directly facilitate the diffusion of oxygen. Water mainly supports the activation of metabolic processes.