Plant Kingdom Chapter-Wise Test 12

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which of the following statements about Phaeophyceae is correct?

Phaeophyceae lack chlorophyll and rely on carotenoids alone.
Their color varies from olive green to brown due to fucoxanthin.
Phaeophyceae store food as starch in pyrenoids.
They reproduce asexually only by non-motile spores.
2

The color of Phaeophyceae varies from olive green to brown due to the presence of fucoxanthin.

Which of the following statements about Chlorophyceae is incorrect?

Chlorophyceae are grass-green due to chlorophyll a and b.
Their cell walls have an inner layer of cellulose.
Chlorophyceae include unicellular forms like Chlamydomonas.
Chlorophyceae have unequal lateral flagella like Phaeophyceae.
4

Chlorophyceae have 2-8 equal, apical flagella, unlike Phaeophyceae with unequal, lateral flagella.

In pteridophytes, which structure directly gives rise to the antheridium and archegonium?

Sporophyte
Prothallus
Spore
Rhizome
2

The prothallus, a gametophyte structure in pteridophytes, produces antheridia (male) and archegonia (female).

Which of the following statements about pteridophytes is incorrect?

Pteridophytes possess vascular tissues like xylem and phloem.
The main plant body in pteridophytes is a sporophyte.
All pteridophytes are homosporous.
Pteridophytes include ferns and horsetails.
3

Not all pteridophytes are homosporous; some, like Selaginella and Salvinia, are heterosporous.

Which pteridophyte has microphyllous leaves?

Dryopteris
Selaginella
Pteris
Adiantum
2

Selaginella, a lycopsid pteridophyte, has small, simple leaves known as microphylls.

Which of the following statements about pteridophytes is incorrect?

Pteridophytes have leaves that can be microphylls or macrophylls.
The sporophyte bears sporangia subtended by sporophylls.
Pteridophytes require water for fertilization due to flagellated antherozoids.
Heterospory in pteridophytes leads to naked seed formation.
4

Heterospory in pteridophytes is a precursor to the seed habit, but seeds are not formed; this occurs in gymnosperms and angiosperms.

Which structure forms the pollen tube in gymnosperms for fertilization?

Ovule
Male gametophyte
Female cone
Microsporangium
2

In gymnosperms, the male gametophyte forms the pollen tube to transport sperm cells to the ovule.

Which of the following statements about gymnosperms is incorrect?

Gymnosperms have thick cuticles to withstand extreme conditions.
Some gymnosperms have pinnate leaves persisting for years.
Gymnosperms produce true fruits like angiosperms.
Examples include Cycas and Cedrus.
3

Gymnosperms produce naked seeds, not true fruits, which are characteristic of angiosperms.

Which of the following statements about bryophytes is correct?

Bryophytes have a dominant sporophyte with true vascular tissues.
The archegonium in bryophytes produces a single egg.
Bryophytes reproduce asexually only by spores.
The gametophyte in bryophytes is diploid and spore-producing.
2

The archegonium, the female sex organ in bryophytes, is flask-shaped and produces one egg.

Which among the following is an example of a red alga?

Laminaria
Porphyra
Ulothrix
Chlamydomonas
2

Porphyra is a member of Rhodophyceae, also known as red algae.

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