Question

which of the following is a characteristic of gymnosperms that distinguishes them from angiosperms?

• they produce seeds on the surface of cone scales.
• they can produce wood through secondary growth.
• they produce seeds inside flowers that develop into fruit.
• they have leaves throughout the year.

Explanation:

Analyze the question

The question asks for a characteristic of gymnosperms that distinguishes them from angiosperms. This requires understanding the evolutionary differences between the two main groups of seed plants, building on Seed Plant Evolution.

Evaluate the first option

Gymnosperms (literally "naked seeds") produce seeds that are exposed on the surface of modified leaves or scales, which typically form cones (strobili). Angiosperms produce seeds enclosed within an ovary (which becomes a fruit). Therefore, producing seeds on the surface of cone scales is a distinguishing feature of gymnosperms.

Evaluate the second option

Both gymnosperms (such as conifers) and many angiosperms (such as woody dicots) can undergo secondary growth to produce wood. Thus, this characteristic does not distinguish gymnosperms from angiosperms.

Evaluate the third option

Producing seeds inside flowers that develop into fruit is the defining characteristic of angiosperms, not gymnosperms.

Evaluate the fourth option

While many gymnosperms (like conifers) are evergreen and have leaves throughout the year, some are deciduous (like Ginkgo biloba). Furthermore, many angiosperms are also evergreen. Thus, this is not a reliable distinguishing characteristic.

Answer:

• (A) They produce seeds on the surface of cone scales. (Correct answer)
• (B) They can produce wood through secondary growth.
• (C) They produce seeds inside flowers that develop into fruit.
• (D) They have leaves throughout the year.