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4

Which of the following statements are incorrect?

A. Pyrenoids contain protein besides starch.

B. Sexual reproduction may be isogamous, oogamous and anisogamous in green and brown algae.

C. Some of the members of algae also occur in association with fungi (lichen) and animals (eg, on sloth bear).

D. The leaves in pteridophytes are well adapted to withstand extremes of temperature, humidity and wind.

Correct Answer :

D. The leaves in pteridophytes are well adapted to withstand extremes of temperature, humidity and wind.


The leaves in gymnosperms are well adapted to withstand extremes of temperature, humidity and wind. In conifers, the needle like leaves reduces surface area. Their thick cuticle and sunken stomata also help to reduce water loss.

Related Questions

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4

What is common in all the three, Funaria, Dryopteris and Ginkgo?

A. Independent sporophyte

B. Presence of archegonia

C. Well developed vascular tissues

D. Independent gametophyte

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4

What is the number and position of insertions of flagella in rhodopyceae class of algae ?

A. 2 - 8, equal, apical

B. 2, unequal, lateral

C. 2 - 6, equal, lateral

D. Absent

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4

Match column-I with column-II and choose the correct option.
Column-IColumn-II
A. Amphibian of theI. Sphagnum plant kingdom
B. Specialized structuresII. Angiosperms in liverworts for asexual reproduction
C. Monocotyledons andIII. Bryophytes dicotyledons
D. A plant which hasIV. Gemmae capacity to holding water

A. A III; B IV; C I; D II

B. A III; B IV; C II; D I

C. A IV; B III; C II; D I

D. A III; B II; C IV; D I

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4

Which of the following statement(s) is/are correct about pteridophytes ?
(i) The main plant body is a sporophyte which is differentiated into true roots and leaves.
(ii) The leaves are small (microphylls) as in ferns or large (macrophylls) as in Selaginella.
(iii) Genera like Selaginella and Salvinia which produce two kinds of sporesmacro (large) and micro (small) spores, are known as heterospores.
(iv) Common examples are Funaria, Polytrichum and Sphagnum.

A. Both (i) and (ii)

B. Both (ii) and (iii)

C. Both (i) and (iii)

D. All of these

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4

Which of the following class of algae is mostly found in salt water ?

A. Phaeophyceae

B. Rhodophyceae

C. Chlorophyceae

D. Both (a) and (b)

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4

Which of the following branch of science is being described by the given statements ?
(i) It can easily done by using computers based on all observable characters.
(ii) Numbers and codes are assigned to all the characters and the data are then processed.
(iii) Each character is given equal weightage and at the same time hundred of characters can be considered.

A. Cytotaxonomy

B. Numerical taxonomy

C. Chemotaxonomy

D. ??-taxonomy

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4

Deep in the tropical rain forest, a botanist discovered an unusual plant with vascular tissues, stomata, a cuticle, flagellated sperm, conelike reproductive structures bearing seeds, and an alternation-of-generations life cycle. He was very excited about this discovery because it would be rather unusual for a plant to have both

A. a cuticle and flagellated sperm.

B. vascular tissues and alternation of generations.

C. seeds and flagellated sperm.

D. alternation of generations and seeds.

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4

Bryophytes are different from fungi in having

A. land habit.

B. sterile jacket layers.

C. multiflagellate gametes.

D. gametophytic plant body.

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4

Which of the following statements with respect to gymnosperms and angiosperms is/are correct?
(i) The process of double fertilization is present in gymnosperms.
(ii) Angiosperms range in size from microscopic Wolffia to tall trees of Sequoia.
(iii) In gymnosperms, the seeds are not covered.
(iv) In gymnosperms, the male and female gametophytes have an independent free living existence. Of the above statements

A. (i) and (ii)

B. (iii) only

C. (ii) and (iii)

D. (iii) and (iv)

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4

If the cells of root in wheat plant have 42 chromosomes, then the no. of chromosome in the cell of pollen grain is

A. 14

B. 21

C. 28

D. 42

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4

Refer the statement and answer the question. They usually reproduce vegetatively by fragmentation and asexually by non - motile spores and sexually by non - motile gametes.
Identify the group of plants and its example.

A. Mosses, Funaria

B. Red algae, Polysiphonia

C. Brown algae, Laminaria

D. Pteridophytes, Selaginella

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4

You are given an unknown plant to study in the laboratory. You find that it has chlorophyll, no xylem. Its multicellullar sex organs are enclosed in a layer of jacket cells. Its gametophyte stage is free living. The plant probabily belongs to

A. chlorophyceae

B. bryophyte

C. pteridophyte

D. gymnosperm

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Fusion of two gametes which are dissimilar in size is termed as _______.

A. isogamous

B. oogamous

C. anisogamous

D. agamous

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Flagellate isogametes and anisogametes are found in

A. Spirogyra

B. Fucus

C. Volvox

D. Chlamydomonas

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4

Phylogenetic classification system is based on the

A. morphological characters of various organisms.

B. anatomical characters of various organisms.

C. physiological characters of various organisms.

D. evolutionary relationships between the various organisms.

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4

In bryophytes, male and female sex organs are called ______ and ______ respectively.

A. microsporangia; macrosporangia

B. male strobili; female strobili

C. antheridia; archegonia

D. androecium; gynoecium

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4

Match the column I with column II and choose the option which shows its correct combination.
Column-IColumn-II
(Pattern of life cycle in plant)(Examples)
A. HaplonticI. Bryophytes, Pteridophytes, life cycle Ectocarpus, Polysiphonia, Kelps
B. DiplonticII. Seed bearing plants life cycle (Gymnosperm and Angiosperm), Fucus
C. Haplo-diplonticIII. Many algae (Volvox, life cycle Spirogyra) and some species of Chlamydomonas

A. A III; B II; C I

B. A I; B II; C III

C. A II; B I; C III

D. A III; B I; C II

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4

A student was given a sample to observe under the microscope. He observed and found that the sample is the most common type of spore involved in asexual reproduction in algae. Identify the spore.

A. Zoospore

B. Endospore

C. Hypnospore

D. None of the above

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4

Which of the following statements are incorrect?

A. Pyrenoids contain protein besides starch.

B. Sexual reproduction may be isogamous, oogamous and anisogamous in green and brown algae.

C. Some of the members of algae also occur in association with fungi (lichen) and animals (eg, on sloth bear).

D. The leaves in pteridophytes are well adapted to withstand extremes of temperature, humidity and wind.

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4

Which of the following pair is incorrectly matched ?

A. Chlorophyceae Major pigments are chl a and b.

B. Phaeophyceae Cell wall is made up of cellulose and algin.

C. Rhodophyceae Stored food is mannitol.

D. Chlorophyceae Cell wall is made up of cellulose.

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4

Algin, carrageen and proteins are obtained from

A. red algae, brown algae, green algae respectively.

B. brown algae, red algae, green algae respectively.

C. red algae, green algae, brown algae respectively.

D. green algae, brown algae, red algae respectively.

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4

Cycas and Adiantum resemble each other in having

A. seeds

B. motile sperms

C. cambium

D. vessels

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4

Fruits are not formed in gymnosperms because of

A. absence of pollination.

B. absence of seed.

C. absence of fertilization.

D. absence of ovary.

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4

Moss peat is used as a packing material for sending flowers and live plants to distant places because

A. it reduces transpiration.

B. it serves as a disinfectant.

C. it is easily available.

D. it is hygroscopic.

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4

Protonema

A. is a stage of gametophytic generation.

B. is a creeping, green, branched and develops directly from a spore.

C. produces lateral bud which forms leafy plant body.

D. All of the above

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4

Chemotaxonomy is connected with

A. classification of chemicals found in plants.

B. use of phytochemical data in systematic botany.

C. application of chemicals on herbarium sheets.

D. use of statistical methods in chemical yielding plants.

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4

Place the following groups of plants in order, beginning with those that first appeared on the earth and progressing toward those that appeared most recently in time.

A. Gymnosperms, angiosperms, ferns, moss, algae

B. Algae, moss, ferns, gymnosperms, angiosperms

C. Moss, algae, ferns, angiosperms, gymnosperms

D. Algae, ferns, angiosperms, gymnosperms, moss

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4

Why rhodophyta exhibit a red colour ?

A. Since most rhodophyta grow at great depths, the chlorophyll can only absorb light in the red area of the spectrum.

B. The wavelengths of light that are absorbed by chlorophyll are passed to phycoerythrin (a red pigment).

C. Red pigment of rhodophyta absorbs all the light waves.

D. The light reaching the greatest depth in water is in the blue-green region of the spectrum, is absorbed by phycoerythrin.

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_______ represent the reproductive organs amongst gymnosperms.

A. Prothallus

B. Capsules

C. Setae

D. Cones

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Which of the following statement(s) is/are correct about angiosperms ?
(i) In angiosperms or flowering plants, the pollen grains and ovules are developed in specialised structure called flowers.
(ii) They are divided into two classes : the dicotyledons and the monocotyledons.
(iii) The male sex organ in a flower is the pistil or the carpel.
(iv) The female sex organ is the stamen.

A. Only (i)

B. Both (i) and (ii)

C. Both (ii) and (iv)

D. All of these