Plant Kingdom
Test 3

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which of the following structures is haploid in gymnosperms?

Pollen grain
Zygote
Sporophyte
Seed
1

The pollen grain is the male gametophytic generation and is haploid in gymnosperms.

Which type of spores are produced by homosporous pteridophytes?

Only megaspores
Only microspores
Spores of the same type
Both megaspores and microspores
3

Homosporous pteridophytes produce spores that are morphologically similar but may develop into bisexual gametophytes.

Which of the following statements about algae is correct?

Algae are heterotrophic organisms lacking chlorophyll.
Some algae form symbiotic associations with fungi in lichens.
Algae are primary consumers in aquatic food chains.
All algae reproduce asexually by fragmentation only.
2

Some algae associate with fungi to form lichens, as mentioned with examples like sloth bear associations.

Which of the following statements about Phaeophyceae is correct?

Phaeophyceae lack photosynthetic pigments like chlorophyll.
The vegetative cells in Phaeophyceae have a gelatinous coating of algin.
Phaeophyceae reproduce asexually only by fragmentation.
Their dominant pigment is chlorophyll b.
2

The vegetative cells of Phaeophyceae have a cellulosic wall covered by a gelatinous coating of algin.

Which of the following statements about algae is incorrect?

Fusion of a large, non-motile female gamete with a smaller, motile male gamete in algae is oogamous.
Algae like Volvox and Fucus exhibit oogamous reproduction.
All algae are aquatic and lack terrestrial forms.
Algae can form colonial structures like Volvox.
3

Algae are not all aquatic; they also occur on moist stones, soils, and wood, as stated in the PDF.

Which of the following statements about algae is correct?

Algae lack photosynthetic pigments and are heterotrophic.
Some algae occur on moist stones and wood.
All algae produce carrageen as a hydrocolloid.
Algae are classified into two classes only.
2

Algae occur in diverse habitats, including moist stones, soils, and wood, beyond just aquatic environments.

Which type of sporangia arrangement is seen in Equisetum?

Clustered in sori
Arranged in cones
Scattered on leaves
Borne on rhizoids
2

In Equisetum, sporangia are borne in strobili (cones), which are compact structures formed by sporophylls.

Which class of algae is characterized by the presence of r-phycoerythrin pigment?

Chlorophyceae
Phaeophyceae
Rhodophyceae
Xanthophyceae
3

Rhodophyceae (red algae) are characterized by the red pigment r-phycoerythrin.

What is the role of columella in the capsule of a moss?

Photosynthesis
Spore protection
Spore dispersal
Anchorage
2

In mosses, the columella is a sterile tissue that provides mechanical support and protects developing spores.

Which of the following statements about Chlorophyceae is incorrect?

Chlorophyceae have a rigid cell wall made of cellulose and pectose.
Pyrenoids in Chlorophyceae contain protein and starch.
Chlorophyceae are exclusively marine algae.
Examples include Chlamydomonas and Ulothrix.
3

Chlorophyceae are not exclusively marine; they occur in freshwater, brackish water, and saltwater.

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