Plant Kingdom

NEET Biology · 90 questions · Page 6 of 9 · Click an option or "Show Solution" to reveal answer

Q51

How many of the following statements are correct? A. In liverworts and ferns gametophytes are free living. B. Gymnosperms and genera like Selaginella and Salvinia are heterosporous. C. The sporophyte in mosses is more elaborate than that of liverworts. D. Pinus is monoecious and Marchantia is dioecious.

A Three

B Four

C One

D Two

Correct Answer

Option A

Solution

A, B, C are correct.

D is partially wrong since statement says Pinus is monoecious which is correct, but must also verify Marchantia is dioecious which is also correct.

Three statements (A, B, C) are fully correct.

Q52

Isogamous condition with non-flagellated gametes is found in

A Volvox

B Fucus

C Chlamydomonas

D Spirogyra

Correct Answer

Option D

Solution

In Spirogyra, sexual reproduction occurs through conjugation.

Gametes are non-flagellated, morphologically similar but physiologically different.

Q53

Monoecious plant of Chara shows occurrence of

A upper antheridium and lower oogonium on the same plant

B upper oogonium and lower antheridium on the same plant

C antheridiophore and archegoniophore on the same plant

D stamen and carpel on the same plant

Correct Answer

Option B

Solution

In Chara, male sex organ (antheridium/globule) and female sex organ (oogonium) develop on the same branchlet, with oogonium at the top.

Q54

Which one of the following pairs is wrongly matched?

A Ginkgo - Archegonia

B Salvinia - Prothallus

C Viroids - RNA

D Mustard - Synergids

Correct Answer

Option B

Solution

Salvinia is a heterosporous pteridophyte which does produce a prothallus.

Viroids have free RNA.

Mustard as angiosperm has synergids.

Ginkgo as gymnosperm has archegonia.

Q55

How many organisms are autotrophs? Lactobacillus, Nostoc, Chara, Nitrosomonas, Nitrobacter, Streptomyces, Saccharomyces, Trypanosoma, Porphyra, Wolffia

A Four

B Five

C Six

D Three

Correct Answer

Option C

Solution

Nostoc, Chara, Porphyra and Wolffia are photoautotrophs. Nitrosomonas and Nitrobacter are chemoautotrophs. Total = 6.

Q56

How many of the following statements are correct? A. In Equisetum, female gametophyte is retained on parent sporophyte. B. In Ginkgo, male gametophyte is not independent. C. Sporophyte in Riccia is more developed than Polytrichum. D. Sexual reproduction in Volvox is isogamous. E. Spores of slime moulds lack cell walls.

A Two

B Three

C Four

D One

Correct Answer

Option D

Solution

Only statement B is correct - in Ginkgo (gymnosperm) the male gametophyte is not free-living.

A is wrong (Equisetum gametophyte is free), C is wrong (moss sporophyte more elaborate than liverwort), D is wrong (Volvox is oogamous), E is wrong (slime mould spores have walls).

Q57

Which one of the following is common to multicellular fungi, filamentous algae and protonema of mosses?

A diplontic life cycle

B Members of Kingdom Plantae

C Mode of Nutrition

D Multiplication by fragmentation

Correct Answer

Option D

Solution

All show multiplication by fragmentation.

Fungi are in their own kingdom.

Mosses show haplo-diplontic life cycle.

Fungi are heterotrophs while algae and moss are autotrophic.

Q58

Cycas and Adiantum resemble each other in having

A seeds

B motile sperms

C cambium

D vessels

Correct Answer

Option B

Solution

Both Cycas (gymnosperm) and Adiantum (pteridophyte) have motile sperms. True vessels are absent in both.

Q59

Which one of the following is a correct statement?

A Pteridophyte gametophyte has a protonemal and leafy stage

B In gymnosperms, female gametophyte is free-living

C Antheridiophores and archegoniophores are present in pteridophytes

D Origin of seed habit can be traced in pteridophytes

Correct Answer

Option D

Solution

Origin of seed habit started in pteridophyte Selaginella.

Gametophyte of bryophytes (not pteridophytes) has protonemal and leafy stage.

Gymnosperm female gametophyte is not free-living.

Antheridiophores/archegoniophores are in Marchantia (bryophyte).

Q60

Examine figure of female thallus of Marchantia. Parts A=Archegoniophore, B=Female thallus, C=Gemmacup, D=Rhizoids

A (A) Archegoniophore (B) Female thallus (C) Gemmacup (D) Rhizoids

B (A) Antheridiophore (B) Male thallus (C) Globule (D) Roots

C (A) Archegoniophore (B) Female thallus (C) Bud (D) Foot

D (A) Seta (B) Sporophyte (C) Protonema (D) Rhizoids

Correct Answer

Option A

Solution

The given figure is of female thallus of Marchantia (bryophyte) in which A, B, C and D are archegoniophore, female thallus, gemmacup and rhizoids respectively.

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