Question

Study the following lists.

List-I	List-II
(A) Sex hormone	(I) Fertilization in Funaria
(B) Cell wall breaking enzyme	(II) Formation of zygophores in Rhizopus
(C) Sugary mucilaginous substance	(III) Formation of buds in Funaria
(D) Naturally occurring growth factor	(IV) Fertilization of Pteris
	(V) Conjugation in Spirogyra

• A. A- (V), B- (II), C- (IV), D- (III)
• B. A- (V), B- (IV), C- (III), D- (II)
• C. A- (II), B- (IV), C- (III), D- (II)
• D. A- (II), B- (V), C- (I), D- (III)

Answer 1

Answer: (D)

A- (II), B- (V), C- (I), D- (III)

In Funaria the female reproductive organ archegonium is a flask shaped structure differtiated nto two parts, venter and neck. Venter contains egg cell and venter canal cell. The neck is longer and contain six to ten neck canal cells. The neck is closed with cover cell.During fertilisation, the ventral canal cells and neck canal cells degenerate and produce mucillagenous substance. Mucillagnous substance absorbs water, swells up and gives pressure on the cover cellto separatapart. In this way there is formation of passage

Asexual reproduction in Funaria can take place by formation of bud like structure on rhizoids branches. The buds propagate into new plant by detaching themselves from parent plant. This is the method of natural vegetative propagation.

Pteris is a genus of fern which reproduces through spore formation.

Rhizopus is a genus of common saprophytic fungi. They reproduce by forming asexual and sexual spores. In sexual reproduction, a dark zygophore

roduced at the point where two compatible myelia fuse. Upon germination, a zygophore produces colonies that are genetically different from either parents.

In spirogyra, an algae, sexual reproduction occurs by conjugation. Two different filaments line side by side either partially or throughout their length. One cell each from opposite lined filaments emits tubular protuberances known as conjugation tubes, which elongate and fuse, to make a passage called the conjugation canal. The cytoplasm of the cell acting as the male travels through this tube and fuses with the female cytoplasm, and the gametes fuse to form zygospore. In lateral conjugation two cells behave like two filaments.

So sex hormones are useful in zygospore formation in Rhizopus. Cellwall breaking enzyme is formed in Spirogyra.Mucillagenous substance is in Funaria and growth factor is in budding of Funaria.

Option D is correct.