Question

An extinct order of Gymnosperm that includes Paleozoic fossil plant

• A. Dicots
• B. Ginkgoales
• C. Bryophyte
• D. Pteridophyte

Hint:

You can solve this using the process of elimination:
- Dicots are angiosperms.
- Bryophytes and Pteridophytes are non-seed plants.
- This leaves Ginkgoales as the only gymnosperm order.

Answer 1

The Correct Option is B

Step 1: Understanding the Concept:
Gymnosperms are seed plants with seeds that are not enclosed within an ovary.
While some gymnosperm lineages are still common today, several ancient groups are known primarily or entirely from the fossil record.

Step 2: Detailed Explanation:
Let us analyze the provided options to find the correct gymnosperm group:
- Dicots (Dicotyledonous plants) are a class of flowering plants (Angiosperms), which produce seeds enclosed within a fruit. They are not gymnosperms.
- Bryophytes are non-vascular, land-dwelling plants (such as mosses, liverworts, and hornworts) that do not produce seeds.
- Pteridophytes are vascular, spore-producing plants (such as ferns and horsetails) that also do not produce seeds.
- Ginkgoales is an ancient order of gymnosperms that first appeared during the late Paleozoic (Permian period) and reached its peak diversity during the Mesozoic era.
While the order was once highly diverse and widely distributed, almost all its species became extinct over time.
Today, the order contains only a single surviving species, Ginkgo biloba (the maidenhair tree), which is often called a "living fossil."
Because all other families, genera, and species within the Ginkgoales are extinct fossil plants from the Paleozoic and Mesozoic eras, it is classified as an extinct order in paleobotany.
It is also the only gymnosperm group listed among the options.
Therefore, the correct option is (B).

Step 3: Final Answer:
The gymnosperm order consisting primarily of Paleozoic and Mesozoic fossil plants is Ginkgoales.