A) Gnetum
B) Cycas
C) Ginkgo
D) Both (a) and (b)
Correct Answer: D
Solution :
When a group of plants is represented by a single genus or species, while rest of the other representatives of the group have become extinct and fossilized, the long surviving individual is called a living fossil, eg, Ginkgo biloba. However, Cycas is also regarded as a living fossil because most of the cycad species are confined to tropical and subtropical regions and the group is becoming endangered. Therefore, cycads have been referred as reptiles of plant kingdom or panda of vegetable kingdom.
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