Plant Kingdom
Test 4

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which of the following statements about algae is correct?

Algae are exclusively marine organisms.
Algae reproduce only by vegetative methods.
Algae contribute significantly to global carbon dioxide fixation.
Algae lack chlorophyll and are heterotrophic.
3

Algae play a crucial role in carbon dioxide fixation through photosynthesis, contributing to global oxygen production.

Which class of algae is characterized by cup-shaped chloroplasts?

Rhodophyceae
Phaeophyceae
Chlorophyceae
Xanthophyceae
3

Members of Chlorophyceae (green algae) such as Chlamydomonas have cup-shaped chloroplasts.

Which structure anchors the thallus to the substrate in bryophytes?

Roots
Rhizoids
Protonema
Gemma cups
2

In bryophytes, rhizoids are root-like structures that anchor the thallus to the substrate.

Which of the following statements about pteridophytes is correct?

Pteridophytes are aquatic plants with no terrestrial forms.
Sporophylls in some pteridophytes form compact structures called strobili.
The gametophyte in pteridophytes is the dominant phase.
Pteridophytes lack sporangia for spore production.
2

In some pteridophytes like Selaginella and Equisetum, sporophylls form strobili or cones.

Which of the following statements about Rhodophyceae is incorrect?

Rhodophyceae contain chlorophyll a, d, and phycoerythrin.
Carrageen is a hydrocolloid produced by red algae.
Rhodophyceae have flagella in their reproductive structures.
Their sexual reproduction involves complex post-fertilization developments.
3

Rhodophyceae lack flagella; their spores and gametes are non-motile.

Which of the following statements about pteridophytes is incorrect?

Pteridophytes are the first terrestrial plants with xylem and phloem.
The gametophytes in pteridophytes require cool, damp, shady places to grow.
Pteridophytes produce naked seeds after fertilization.
Some pteridophytes, like Selaginella, are heterosporous.
3

Pteridophytes do not produce seeds; seed formation occurs in gymnosperms and angiosperms.

Which of the following statements about Phaeophyceae is incorrect?

Phaeophyceae possess chlorophyll a, c, carotenoids, and xanthophylls.
Their vegetative cells contain a centrally located vacuole and nucleus.
Phaeophyceae include forms like Dictyota and Fucus.
Phaeophyceae are unicellular algae with no multicellular forms.
4

Phaeophyceae are multicellular, ranging from filamentous Ectocarpus to massive kelps, not unicellular.

Which of the following pteridophytes produces two types of spores (heterospory)?

Lycopodium
Selaginella
Pteris
Adiantum
2

Selaginella is a heterosporous pteridophyte, producing both microspores and megaspores.

Which pteridophyte structure bears sporangia?

Rhizome
Sporophyll
Prothallus
Gemma
2

In pteridophytes, sporophylls (leaf-like structures) bear sporangia.

What is the term for the multicellular structure that produces eggs in bryophytes and pteridophytes?

Antheridium
Archegonium
Protonema
Gemma cup
2

Archegonium is the female reproductive organ that produces eggs in bryophytes and pteridophytes.

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