Plant Kingdom

NEET Biology · 90 questions · Page 5 of 9 · Click an option or "Show Solution" to reveal answer

Q41

Read the following five statements and select the option with all correct statements: A. In liverworts, mosses and ferns gametophytes are free-living. B. Gymnosperms and some ferns are heterosporous. C. Main plant body in bryophytes is gametophytic whereas in pteridophytes it is sporophytic. D. In gymnosperms male and female gametophytes are present within sporangia located on sporophyte.

A A, D and E

B B, C and E

C A, C and D

D B, C and D

Correct Answer

Option A

Solution

Mosses, liverworts and ferns have free-living gametophytes.

Gymnosperms and genera like Selaginella/Salvinia are heterosporous.

Main plant body in bryophytes is gametophytic and in pteridophytes is sporophytic.

Gametophytes of gymnosperms are within sporangia on sporophyte.

Q42

In which of the following, gametophyte is not independent free living?

A Pteris

B Pinus

C Funaria

D Marchantia

Correct Answer

Option B

Solution

Pinus belongs to gymnosperms in which male and female gametophytes do not have an independent free living existence.

They remain within the sporangia.

Q43

Which one of the following is wrong about Chara?

A Upper oogonium and lower round antheridium

B Globule and nucule present on the same plant

C Upper antheridium and lower oogonium

D Globule is male reproductive structure

Correct Answer

Option C

Solution

In Chara, oogonium is borne at the top of the four-celled filament, hence oogonium is upper and antheridium is lower.

Q44

Which of the following is responsible for peat formation?

A Marchantia

B Riccia

C Funaria

D Sphagnum

Correct Answer

Option D

Solution

Sphagnum (peat moss) accumulates year after year forming peat.

Its dead remains accumulate to form dark-coloured mass rich in carbon used as fuel.

Q45

Male gametophyte with least number of cells is present in

A Pteris

B Funaria

C Lilium

D Pinus

Correct Answer

Option C

Solution

In Lilium (angiosperm), male gametophyte is highly reduced to 2 cells.

In Pinus (gymnosperm) it is 3 cells.

Both pteridophyte and bryophyte have multicellular gametophytes.

Q46

The plant body is thalloid in

A Sphagnum

B Salvinia

C Marchantia

D Funaria

Correct Answer

Option C

Solution

The plant body of Marchantia (liverwort) is haploid, gametophytic, dorsoventrally flattened and thallose.

Q47

Which one of the following is wrongly matched?

A Spirogyra - Motile gametes

B Sargassum - Chlorophyll

C Basidiomycetes - Puffballs

D Nostoc - Water blooms

Correct Answer

Option A

Solution

In Spirogyra, gametes are non-motile and sexual reproduction takes place by conjugation.

Q48

Syngamy can occur outside the body of the organism in

A mosses

B algae

C ferns

D Fungi

Correct Answer

Option B

Solution

External syngamy (fertilization outside the organism) occurs in majority of algae.

Q49

What is common in all three: Funaria, Dryopteris and Ginkgo?

A Presence of archegonia

B Well developed vascular tissues

C Independent gametophyte

D Independent sporophyte

Correct Answer

Option A

Solution

The female sex organ archegonium is formed in bryophytes (Funaria), pteridophytes (Dryopteris) and gymnosperms (Ginkgo).

Q50

Select the wrong statement about sexual reproduction in algae

A In Oomycetes, female gamete is smaller and motile, while male gamete is larger and non-motile

B Chlamydomonas exhibits both isogamy and anisogamy and Fucus shows oogamy

C Isogametes are similar in structure, function and behaviour

D Anisogametes differ either in structure, function or behaviour

Correct Answer

Option A

Solution

In oomycetes, the female gamete is large and non-motile, while the male gamete is small and motile.

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