Plant Kingdom Chapter-Wise Test 5

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which of the following statements about algae is incorrect?

Algae increase dissolved oxygen levels through photosynthesis.
Sargassum is a marine alga used as food.
All algae have flagellated gametes in sexual reproduction.
Algae are primary producers of energy-rich compounds in aquatic ecosystems.
3

Not all algae have flagellated gametes; e.g., Spirogyra has non-flagellated gametes in isogamous reproduction.

Which division of algae has members that store food as floridean starch?

Chlorophyceae
Phaeophyceae
Rhodophyceae
Xanthophyceae
3

Rhodophyceae (red algae) store food as floridean starch, which is similar to glycogen in structure.

Which of the following statements about liverworts is correct?

Liverworts have a dominant sporophyte with needle-like leaves.
The gemmae in liverworts germinate to form new individuals.
Liverworts lack sex organs like antheridia and archegonia.
The sporophyte in liverworts is haploid and free-living.
2

Gemmae, asexual buds in liverworts, detach from the parent and germinate to form new individuals.

Which of the following algae is used as a protein supplement, even by astronauts?

Spirogyra
Chlorella
Ulothrix
Porphyra
2

Chlorella, a unicellular green alga, is rich in protein and used as a food supplement, including for astronauts.

In gymnosperms, which structure carries the male gametes to the ovule?

Pollen grain
Pollen tube
Sporangium
Strobilus
2

In gymnosperms, the pollen tube carries the male gametes from the pollen grain to the ovule for fertilization.

Which of the following statements about liverworts is incorrect?

Liverworts produce spores within a capsule after meiosis.
The gametophyte in liverworts can be thalloid or leafy.
Liverworts have a sporophyte with true roots and stems.
Marchantia is an example of a liverwort with a thalloid body.
3

The sporophyte in liverworts lacks true roots and stems; it is simple, with a foot, seta, and capsule.

Which plant group was the first to develop vascular tissues?

Bryophytes
Pteridophytes
Gymnosperms
Angiosperms
2

Pteridophytes were the first terrestrial plants to develop vascular tissues (xylem and phloem) for conduction.

Which of the following statements about gymnosperms is correct?

Gymnosperms produce fruits to enclose their seeds.
The female gametophyte in gymnosperms bears two or more archegonia.
Gymnosperms lack a pollen tube for fertilization.
All gymnosperms have pinnate leaves like Pinus.
2

The female gametophyte in gymnosperms, retained within the megasporangium, bears two or more archegonia.

Which of the following statements about algae is correct?

Algae lack chlorophyll and are not autotrophic.
Fusion of gametes dissimilar in size in algae is termed anisogamous.
All algae produce flagellated zoospores for asexual reproduction.
Algae are classified into five classes including gymnosperms.
2

Anisogamous reproduction in algae involves the fusion of two gametes dissimilar in size, as seen in Eudorina.

Which of the following statements about Rhodophyceae is incorrect?

Rhodophyceae are mostly marine and multicellular.
Sexual reproduction in Rhodophyceae is oogamous.
Rhodophyceae reproduce asexually by flagellated zoospores.
Examples include Polysiphonia and Porphyra.
3

Rhodophyceae reproduce asexually by non-motile spores, not flagellated zoospores.

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