Plant Kingdom Chapter-Wise Test 19

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which of the following statements about liverworts is correct?

Liverworts have a dominant sporophyte with vascular tissues.
The thallus in liverworts like Marchantia is dorsiventral.
Liverworts reproduce sexually by flagellated spores.
The gametophyte in liverworts is diploid.
2

The plant body of liverworts, such as Marchantia, is thalloid and dorsiventral, appressed to the substrate.

Which structure in pteridophytes bears sporangia?

Prothallus
Sporophyll
Rhizome
Gemma cup
2

In pteridophytes, sporangia are borne on leaf-like appendages called sporophylls.

Which of the following statements about gymnosperms is incorrect?

Gymnosperms produce microsporophylls and megasporophylls in cones.
The male gametophyte in gymnosperms is reduced to a pollen grain.
Gymnosperms have independent, free-living gametophytes.
Some gymnosperms, like Cycas, have coralloid roots with N₂-fixing cyanobacteria.
3

Unlike bryophytes and pteridophytes, gymnosperm gametophytes are not free-living; they remain within the sporangia.

Which of the following statements about pteridophytes is incorrect?

Pteridophytes are used as ornamentals and soil-binders.
The sporangia in pteridophytes produce spores by meiosis.
All pteridophytes have large macrophylls like ferns.
Water is required to transfer antherozoids to the archegonium.
3

Not all pteridophytes have macrophylls; some, like Selaginella, have small microphylls.

Which pigment is responsible for the brown color in Phaeophyceae?

Chlorophyll a
Phycoerythrin
Fucoxanthin
Carotene
3

Fucoxanthin, a xanthophyll pigment, gives brown algae their characteristic color.

Which of the following statements about Phaeophyceae is incorrect?

Phaeophyceae include massive forms like kelps up to 100 meters.
Their plant body may have a holdfast, stipe, and frond.
Phaeophyceae reproduce sexually only by oogamy.
Examples include Laminaria and Sargassum.
3

Phaeophyceae exhibit isogamous, anisogamous, or oogamous sexual reproduction, not only oogamy.

Which of the following statements about gymnosperms is correct?

Gymnosperms produce true flowers like angiosperms.
Their leaves are adapted to reduce surface area in conifers.
Gymnosperms lack ovules and rely on spores alone.
All gymnosperms have coralloid roots with cyanobacteria.
2

In conifers (gymnosperms), needle-like leaves reduce surface area to minimize water loss.

Which of the following statements about mosses is incorrect?

Mosses have slender axes with spirally arranged leaves.
Some mosses decompose rocks, aiding higher plant growth.
Mosses possess true stems with xylem and phloem.
Examples include Funaria and Polytrichum.
3

Mosses lack true stems with vascular tissues; they have stem-like structures without xylem or phloem.

Which of the following statements about Rhodophyceae is incorrect?

Rhodophyceae are mostly marine, with some in freshwater.
Their asexual reproduction involves non-motile spores.
Rhodophyceae have a cell wall with cellulose and polysulphate esters.
The red pigment in Rhodophyceae is fucoxanthin.
4

The red pigment in Rhodophyceae is r-phycoerythrin, not fucoxanthin, which is found in Phaeophyceae.

Which type of storage food is found in red algae?

Starch
Mannitol
Floridean starch
Laminarin
3

Red algae store food in the form of floridean starch, which is similar to glycogen in structure.

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