Plant Kingdom Chapter-Wise Test 17

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which of the following statements about gymnosperms is correct?

Gymnosperms produce flowers as reproductive structures.
Some gymnosperms have mycorrhizal roots for nutrient absorption.
Gymnosperms lack ovules and produce spores only.
All gymnosperms have simple leaves like Cycas.
2

Some gymnosperms, like Pinus, have mycorrhizal roots associated with fungi for nutrient uptake.

Which pteridophyte is considered a living fossil and shows primitive vascular tissue organization?

Selaginella
Equisetum
Psilotum
Adiantum
3

Psilotum, known as a "living fossil," has a primitive vascular system and is one of the simplest vascular plants.

Which pigment is absent in brown algae?

Chlorophyll a
Chlorophyll c
Fucoxanthin
Chlorophyll b
4

Brown algae (Phaeophyceae) contain chlorophyll a, c, and fucoxanthin but lack chlorophyll b.

Which of the following methods is used in cytotaxonomy?

Analysis of evolutionary relationships
Study of chromosome number and structure
Use of computers for classification
Study of plant chemistry
2

Cytotaxonomy is based on the study of cytological characters such as chromosome number, structure, and behavior.

Which of the following statements about Rhodophyceae is incorrect?

Rhodophyceae have a red color due to r-phycoerythrin.
Their thalli can have complex multicellular organization.
Rhodophyceae produce agar from species like Gelidium.
Rhodophyceae have flagellated zoospores like Chlorophyceae.
4

Rhodophyceae lack flagella; their spores are non-motile, unlike Chlorophyceae.

Which hydrocolloid obtained from brown algae is used commercially in food industries?

Agar
Carrageenan
Algin
Laminarin
3

Algin, extracted from brown algae (Phaeophyceae), is a hydrocolloid used in food and pharmaceutical industries.

Which of the following statements about pteridophytes is correct?

Pteridophytes lack vascular tissues and rely on diffusion.
The gametophyte in pteridophytes is called prothallus.
Pteridophytes do not produce spores.
The sporophyte in pteridophytes is haploid.
2

The gametophyte in pteridophytes is a small, free-living structure called prothallus.

Which of the following statements about liverworts is correct?

Liverworts have a dominant sporophyte with true leaves.
The female sex organ in liverworts is called antheridium.
Gemmae in liverworts are multicellular asexual buds.
Liverworts lack a thalloid plant body.
3

Gemmae are green, multicellular, asexual buds in liverworts that detach to form new individuals.

Which of the following statements about pteridophytes is incorrect?

Pteridophytes have a sporophyte with true root, stem, and leaves.
The prothallus in pteridophytes bears antheridia and archegonia.
Pteridophytes include homosporous and heterosporous species.
The sporophyte in pteridophytes is haploid and dominant.
4

The sporophyte in pteridophytes is diploid and dominant, not haploid.

Which of the following statements about Rhodophyceae is correct?

Rhodophyceae have flagellated gametes similar to Chlorophyceae.
Their food is stored as floridean starch, similar to glycogen.
Rhodophyceae are unicellular algae found only in freshwater.
The dominant pigment in Rhodophyceae is fucoxanthin.
2

Rhodophyceae store food as floridean starch, which is structurally similar to amylopectin and glycogen.

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