Plant Kingdom Chapter-Wise Test 8

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which of the following statements about Phaeophyceae is correct?

Phaeophyceae lack chlorophyll and rely solely on fucoxanthin.
Their sexual reproduction can be isogamous, anisogamous, or oogamous.
Phaeophyceae store food as floridean starch.
They are unicellular algae found in freshwater only.
2

Phaeophyceae exhibit sexual reproduction that can be isogamous, anisogamous, or oogamous.

Which of the following statements about bryophytes is correct?

Bryophytes have a dominant sporophyte attached to the gametophyte.
The antherozoids in bryophytes are biflagellate.
Bryophytes possess well-differentiated vascular tissues.
The gametophyte in bryophytes is diploid.
2

The male gametes (antherozoids) in bryophytes are biflagellate and produced by the antheridium.

Which of the following statements about algae is correct?

Algae are of no economic importance to humans.
Certain algae like Chlorella are used as food supplements.
Algae decrease dissolved oxygen levels in their environment.
All algae form massive plant bodies like kelps.
2

Chlorella, a unicellular alga rich in proteins, is used as a food supplement, even by space travelers.

Which class of algae has cell walls made of cellulose and pectic substances?

Chlorophyceae
Phaeophyceae
Rhodophyceae
Xanthophyceae
1

In Chlorophyceae (green algae), the cell wall is composed of cellulose and pectic substances.

Which type of reproduction in algae involves the release of biflagellate zoospores?

Vegetative reproduction
Asexual reproduction
Isogamous reproduction
Oogamous reproduction
2

In algae, asexual reproduction occurs by biflagellate, motile zoospores, which germinate to form new plants.

Which feature differentiates liverworts from mosses?

Presence of rhizoids
Dominant gametophyte stage
Gemma cup formation
Sporophyte dependency
3

Liverworts, such as Marchantia, reproduce asexually through specialized structures called gemma cups, which are absent in mosses.

Which of the following statements about liverworts is incorrect?

Liverworts grow on marshy ground and tree bark.
Their thallus is dorsiventral and closely appressed to the substrate.
Liverworts have true leaves like pteridophytes.
Examples include Marchantia with a thalloid body.
3

Liverworts lack true leaves; they have thalloid or leaf-like structures, unlike pteridophytes.

Which of the following statements about Phaeophyceae is incorrect?

Phaeophyceae include profusely branched forms like kelps.
Their cell walls are covered with a gelatinous algin layer.
Phaeophyceae are exclusively freshwater algae.
Examples include Ectocarpus and Sargassum.
3

Phaeophyceae are primarily marine, with rare freshwater occurrences, not exclusively freshwater.

Which of the following statements about mosses is incorrect?

The protonema in mosses is a creeping, branched structure.
Mosses have a sporophyte differentiated into foot, seta, and capsule.
The leafy stage in mosses is haploid and bears sex organs.
Mosses reproduce sexually by fusion of non-motile antherozoids.
4

Antherozoids in mosses are motile and biflagellate, not non-motile, and swim to the archegonium for fertilization.

Which classification system assigns numbers and codes to all characters for analysis?

Artificial classification
Natural classification
Numerical taxonomy
Phylogenetic classification
3

Numerical taxonomy assigns numbers and codes to all observable characters, and computers analyze the data for classification.

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