Plant Kingdom

NEET Biology · 90 questions · Page 8 of 9 · Click an option or "Show Solution" to reveal answer

Q71

Which one of the following plants is monoecious?

A Pinus

B Cycas

C Papaya

D Marchantia

Correct Answer

Option A

Solution

Pinus is monoecious with both male and female cones on the same plant but on different branches.

Q72

Mannitol is the stored food in

A Porphyra

B Fucus

C Gracilaria

D Chara

Correct Answer

Option B

Solution

Mannitol is stored food in Fucus (brown alga, Phaeophyceae).

Q73

Which one of the following is considered important in the development of seed habit?

A Heterospory

B Haplontic life cycle

C Free-living gametophyte

D Dependent sporophyte

Correct Answer

Option A

Solution

Heterospory (differentiation of spores into microspores and megaspores) and retention of megaspore within the megasporangium are essential prerequisites for seed formation.

Q74

Which one of the following is a vascular cryptogam?

A Ginkgo

B Marchantia

C Cedrus

D Equisetum

Correct Answer

Option D

Solution

Pteridophytes are known as vascular cryptogams.

Equisetum is a pteridophyte belonging to class Sphenophyta with vascular tissues.

Q75

Select features distinguishing Gnetum from Cycas and Pinus, showing affinities with angiosperms:

A Perianth and two integuments

B Embryo development and apical meristem

C Absence of resin duct and leaf venation

D Presence of vessel elements and absence of archegonia

Correct Answer

Option D

Solution

Gnetum has vessel elements in xylem (like angiosperms) and lacks archegonia in female gametophyte, showing similarity with angiosperms.

Q76

Which one of the following is heterosporous?

A Adiantum

B Equisetum

C Dryopteris

D Salvinia

Correct Answer

Option D

Solution

Salvinia is heterosporous. Equisetum, Adiantum and Dryopteris are homosporous.

Q77

In which one of the following male and female gametophytes do not have free living independent existence?

A Polytrichum

B Cedrus

C Pteris

D Funaria

Correct Answer

Option B

Solution

Male and female gametophytes of Cedrus (conifer, gymnosperm) do not have free living independent existence.

Q78

Spore dissemination in some liverworts is aided by

A indusium

B calyptra

C peristome teeth

D elaters

Correct Answer

Option D

Solution

Elaters are hygroscopic cells in liverworts that change shape with moisture changes, aiding in spore dispersal.

Q79

Flagellated male gametes are present in all three of:

A Zygnema, Saprolegnia and Hydrilla

B Fucus, Marsilea and Calotropis

C Riccia, Dryopteris and Cycas

D Anthoceros, Funaria and Spirogyra

Correct Answer

Option C

Solution

Riccia (bryophyte), Dryopteris (pteridophyte) and Cycas (gymnosperm) all have flagellated male gametes.

Q80

In gymnosperms, the pollen chamber represents

A a cavity in the ovule in which pollen grains are stored after pollination

B an opening in the megagametophyte through which the pollen tube approaches the egg

C the microsporangium in which pollen grains develop

D a cell in the pollen grain in which the sperms are formed

Correct Answer

Option C

Solution

The pollen chamber represents the microsporangium in which pollen grains develop.

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