Plant Kingdom
Test 1

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which algae produces agar, commonly used for microbial culture?

Ulothrix
Gelidium
Chara
Ectocarpus
2

Gelidium, a red alga, is used for commercial production of agar, a culture medium for microbes.

Which of the following structures helps mosses absorb and retain water?

Leaves
Capsules
Rhizoids
Protonema
3

Rhizoids in mosses function like roots, helping in water absorption and anchorage to the substrate.

Which part of the gymnosperm seed provides nourishment to the developing embryo?

Endosperm
Cotyledon
Pericarp
Ovule
1

In gymnosperms, the endosperm, which is haploid, provides nourishment to the developing embryo.

Which of the following statements about Chlorophyceae is correct?

Chlorophyceae have two unequal laterally attached flagella.
Sexual reproduction in Chlorophyceae can be isogamous.
The stored food in Chlorophyceae is laminarin.
Chlorophyceae are brown algae with fucoxanthin.
2

Sexual reproduction in Chlorophyceae can be isogamous, as seen in Ulothrix, with similar-sized gametes.

Which of the following statements about algae is correct?

Algae are heterotrophic and lack photosynthetic pigments.
Laminaria, a brown alga, is used as food by humans.
All algae have complex plant bodies like gymnosperms.
Algae reproduce only sexually by gamete fusion.
2

Laminaria, a marine brown alga, is among the 70 species of algae used as food.

Which of the following statements about Chlorophyceae is incorrect?

Chlorophyceae have flagellated zoospores produced in zoosporangia.
Their cell wall has an outer layer of pectose.
Chlorophyceae include filamentous forms like Ulothrix.
Chlorophyceae are red algae with phycoerythrin as the dominant pigment.
4

Chlorophyceae are green algae with chlorophyll a and b, not red algae with phycoerythrin.

Which of the following statements about liverworts is incorrect?

Liverworts have a thalloid gametophyte in species like Marchantia.
The sporophyte in liverworts is attached to the gametophyte.
Liverworts produce gemmae in gemma cups for asexual reproduction.
The antherozoids in liverworts are non-motile.
4

Antherozoids in liverworts are biflagellate and motile, not non-motile.

In which group of plants do microspores and megaspores develop into separate male and female gametophytes?

Bryophytes
Pteridophytes and Gymnosperms
Algae
None of these
2

Some pteridophytes (e.g., Selaginella, Salvinia) show heterospory, where microspores form male gametophytes and megaspores form female gametophytes. All gymnosperms are also heterosporous. Hence, the correct answer is "Pteridophytes and Gymnosperms".

Which plant group shows embryo retention but lacks vascular tissues?

Algae
Bryophytes
Pteridophytes
Gymnosperms
2

Bryophytes show embryo retention but do not have vascular tissues, unlike pteridophytes and seed plants.

Which of the following statements about gymnosperms is correct?

Gymnosperms produce seeds enclosed in fruits.
The male and female gametophytes in gymnosperms are free-living.
Gymnosperms are heterosporous, producing microspores and megaspores.
Gymnosperms lack pollen grains.
3

Gymnosperms are heterosporous, forming microspores (pollen grains) and megaspores in cones.

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