Which one of the following is categorised under living fossils:
- Pinus
- Cycas
- Selaginella
- Metasequoia
The Correct Option is B
Solution and Explanation
Cycas is categorized under "living fossils." Living fossils are species that have remained relatively unchanged in terms of morphology over very long periods of geological time. Cycas is a genus of ancient seed plants that has a fossil record dating back to the Mesozoic era and has retained many primitive characteristics, making it a living fossil.
So, the correct option is (B): Cycas
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Concepts Used:
Gymnosperms - Cycas
Gymnosperms is one of the classifications of plants based on the production of flowers. The word gymnosperm is derived from a Greek word called ‘gymnospermous’, which means naked seeds. The gymnosperm plants include ginkgo, pinus, cycas, etc.
Read More: Economic Importance of Gymnosperm
Seeds and stems of cycas revoluta are used to make wine. The gymnosperm plants have a high economic significance for mankind.
Cycas plants belong to the order Cycadales (family Cycadaceae), which consists of 11 genera of tropical and subtropical plants that produce terminal oblong cones containing orange-yellow seeds. Within the Cycadales, C. revoluta is the most cultivated species.