Read the following five statements (A-B) and answer as asked next to them.

(A)    In Equisetum the female gametophyte is retained on the parent sporophyte.

(B)    In Ginkgo male gametophyte is not independent.

(C)    The sporophyte in Riccia is more developed than that in Polytrichum.

(D)    Sexual reprocution in volvox is isogamous.

(E)    The spors of slime molds lack cell walls.

How many of the above statements are correct?

a) 

Three

b) 

Four

c) 

One

d) 

Two

Answers (2)

Reproduction in chlorophyceae -

Vegetative by fragmentation or fission.

Asexual by Zoospores.

Sexual by Isogamous to oogamous.

-

Bryophyta -

Non vascular terrestrial plants present mostly in moist places.

- wherein

Eg Riccia,Funaria,Anthoceros.

Thallophyta / Algae -

Chlorophyll - bearing, thalloid, avascular plants and are usually aquatic.

- wherein

Eg. Chlamydomonas, Volvox.

 

Diplontic life cycle -

Dominant photosynthetic phase is independent diploid sporophyte. Gametophytes are extremely reduced and are dependent on sporophyte.

- wherein

Eg. All gymnosperms and angiosperms,diatoms,some brown algae (Fucus and sargassum )

 

 In Equisetum gametophytes are rarely seen. Riccia (bryophyte) has less developed sporophyte. Volvox (Algae) exhibits oogamous type of sexual reproduction. In shine molds thick cell walls are present. In Grinkgol Gymnosperms gametophytes are dependent on sporophyte

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