Question

Means of perennation in club mosses are
A)Gemmae
B)Tubers
C)Bulbils
D)Both a and c

Answer 1

Hint: Mosses are generally the phylum of nonvascular plants.Generally they produce spores for reproduction. They are taxonomic divisions of the bryophyta.

Complete answer:
Perennation: It is the ability of an organism, mainly plants, to stay alive from one germinating season to the other. Generally during the unfavourable conditions such as drought or winter. It usually involves development of a perennating organ in which it stores sufficient nutrients to maintain the organism during the unfavourable season. And also it develops into one or more new plants in the subsequent year. Commonly seen forms of perennating organs are storage organs examples include tubers, rhizomes and corm, and the buds.

Perennation is very much related with vegetative reproduction at the same time the organisms usually use the same organs for both continued existence and reproduction.
perennation can be also said as the survival of biennial or perennial plants from one year to the subsequent year by vegetative means. In biennials and herbaceous perennials the aerial parts of the plant expire down and the plants stay alive by means of underground storage roots one of the example is carrot, rhizomes example include couch grass, Solomon's seal, tubers (example dahlia), bulbs (example daffodil, snowdrop), or corms (example crocus, gladiolus). These perennating organs are also recurrently responsible for the vegetative propagation. Woody perennials sustain the winter by dropping their metabolic activity , for instance by leaf loss in deciduous trees and shrubs

Tubers are different types of modified plant structures that are distended to store nutrients. They are mainly used by plants to survive the winter or dry months to supply energy and nutrients for re growth throughout the next growing season and as a way of asexual reproduction.

Hence, the correct answer is option (B)

Note: The importance of club mosses include they are low evergreen herbs having needle like or sac like leaves. They are generally homosporous, that is they produce just only one kind of spore.