Plant Kingdom

NEET Biology · 90 questions · Page 7 of 9 · Click an option or "Show Solution" to reveal answer

Q61

Consider the following four statements. The two wrong statements are: A. The sporophyte in liverworts is more elaborate than that in mosses. B. Salvinia is heterosporous. C. The life-cycle in all seed-bearing plants is diplontic. D. In Pinus male and female cones are borne on different trees.

A A and C

B A and D

C B and C

D A and B

Correct Answer

Option B

Solution

The sporophyte in mosses is more elaborate than in liverworts (A is wrong).

Male and female cones are on the same Pinus tree - Pinus is monoecious (D is wrong).

Q62

Selaginella and Salvinia are considered a significant step toward evolution of seed habit because

A female gametophyte is free and gets dispersed like seeds

B female gametophyte lacks archegonia

C megaspores possess endosperm and embryo surrounded by seed coat

D embryo develops in female gametophyte which is retained on parent sporophyte

Correct Answer

Option D

Solution

In Selaginella and Salvinia, the embryo develops in the female gametophyte retained on the parent sporophyte, which is a precursor to the seed habit.

Q63

The gametophyte is not an independent, free-living generation in

A Polytrichum

B Adiantum

C Marchantia

D Pinus

Correct Answer

Option D

Solution

In Pinus (gymnosperm), the gametophyte is not free-living and remains within the sporangia of the sporophyte.

Q64

A prokaryotic autotrophic nitrogen fixing symbiont is found in

A Alnus

B Cycas

C Cicer

D Pisum

Correct Answer

Option B

Solution

Cycas forms symbiotic association with autotrophic nitrogen-fixing cyanobacteria in coralloid roots.

Q65

Compared with gametophytes of bryophytes, gametophytes of vascular plants tend to be

A smaller but to have larger sex organs

B larger but to have smaller sex organs

C larger and to have larger sex organs

D smaller and to have smaller sex organs

Correct Answer

Option D

Solution

Vascular plants have a dominant sporophytic phase with reduced, smaller gametophyte that have smaller sex organs.

Q66

Archegoniophore is present in

A Marchantia

B Chara

C Adiantum

D Funaria

Correct Answer

Option A

Solution

Archegoniophore is the female sex organ of bryophytes like Marchantia.

Q67

Which one of the following is monoecious?

A Marchantia

B Cycas

C Pinus

D Date palm

Correct Answer

Option C

Solution

Pinus is monoecious — both male and female cones or strobili are borne on the same tree.

Q68

Male and female gametophytes are independent and free-living in

A mustard

B castor

C Pinus

D Sphagnum

Correct Answer

Option D

Solution

Sphagnum is a bryophyte in which male and female gametophytes are independent and free-living.

In gymnosperms and angiosperms, gametophyte is highly reduced and dependent on sporophyte.

Q69

Algae have cell wall made up of:

A cellulose, galactans and mannans

B hemicellulose, pectins and proteins

C pectins, cellulose and proteins

D cellulose, hemicellulose and pectins

Correct Answer

Option A

Solution

Majority of eukaryotic algae possess cell walls containing cellulose and other carbohydrates like xylan, mannan, galactan, etc.

Q70

Which one of the following has haplontic life cycle?

A Polytrichum

B Ustilago

C Wheat

D Funaria

Correct Answer

Option D

Solution

In Funaria (moss), the dominant generation is the haploid gametophyte. This is a haplontic life cycle.

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