Biology CLEP Prep Practice Exam

What is the reason for seed dormancy?

1. To ensure long-term survival

2. To prevent growth until conditions improve

3. To protect the seed from germination

4. To scatter the seeds in different directions

The correct answer is: To prevent growth until conditions improve

Seed dormancy is the temporary suspension of a seed's germination even under optimal growing conditions. This helps the seed to survive unfavorable environmental conditions such as drought, cold temperatures, or competition with other plants. Options A and C are incorrect because they provide the same general purpose as seed dormancy, which is survival of the plant. However, these options do not explain why dormancy is necessary for survival. Option D is incorrect because seed dispersal is a separate process from dormancy. While some seeds may use dormancy as a way to disperse, it is not the primary reason for dormancy. Option B is the best answer because it directly addresses the purpose of seed dormancy - to prevent growth until conditions improve. This is a necessary adaptation for plants to ensure that their seeds grow in the most favorable conditions.