Question

Which two groups of Gymnosperms are regarded as living fossil Gymnosperms?
(A) Conferrals and Taxales
(B) Taxales and the Gnetales
(C) Cycadales and the Ginkgoales
(D) Cycadales and the coniferales

Answer 1

Hint: Gymnosperms are the flowerless plants that produce only the spines and the cones. The word gymnosperm means the naked seed but this seed is not located inside the ovary, they are present at the top of the leaves. These plants are believed to be the first plants which is vascular in nature to be inhabited

Complete answer:
In these plants the vascular system is well developed to carry the water. Cycadales have a place with the natural division, Cycadophyta alongwith the fossil order Medullosales. In the gymnosperm life cycle, plants shift back and forth between a sexual stage and an asexual stage. This sort of life cycle is known as alternation of the generation.
The three surviving groups of cycadales are Cycadacea, Strangeriacea, and Zamiacea.

In spite of the fact that they are a minor segment of plant kingdom today, during the Jurassic, they were common. They have changed little since the Jurassic, contrasted with some major developmental changes in other plant divisions. Ginkgoales is a plant order containing just a single surviving group: Ginkgo biloba, the ginkgo tree. It is the monotypic or the only taken that is present inside the class Ginkgoopsida, which itself is monotypic inside the division Ginkgophyta. The request incorporates five families, of which just Ginkgoaceae remains extinct.

Hence the correct answer is OPTION(C)

Note: Gamete production happens in the sexual stage or gametophyte age of the cycle. Spores are created in the asexual stage or sporophyte age. The sporophyte is diploid and the gametophyte is haploid in nature. In gymnosperms, the plant sporophyte constitutes the majority of the plant itself, including roots, leaves, stems, and cones.