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4

Mosses do not have true leaves because their leaf-like structures lack

A. starch in their chloroplast.

B. vascular tissues.

C. chlorophyll.

D. cellulose in their cell walls.

Correct Answer :

B. vascular tissues.


Mosses are non-vascular plants which means they cannot transport water and nutrients to the aerial parts of the plant.

Related Questions

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4

Read the following statements and choose the correct option.
(i) In rhodophyceae, food is stored in the form of mannitol and laminarin.
(ii) The ovules of gymnosperms are not enclosed by ovary wall.
(iii) Salvinia is heterosporous.
(iv) In the diplontic life-cycle, the free living gametophyte represents the dominant phase.

A. (ii) and (iii) are correct but (i) and (iv) are incorrect.

B. (ii) and (iv) are correct but (i) and (iii) are incorrect.

C. (iii) and (iv) are correct but (i) and (ii) are incorrect.

D. (i) and (ii) are correct but (iii) and (iv) are incorrect.

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4

Which one of the following statement concerning the algae is incorrect ?

A. Most algae are photosynthetic.

B. Algae can be classified according to their pigments.

C. All algae are filamentous.

D. Spirogyra does not produce zoospores.

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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

Consider the following statements regarding gymnosperms and choose the correct option.
(i) In gymnosperms, the male and female gametophytes have an independent existence.
(ii) The multicellular female gametophyte is retained within the megasporangium.
(iii) The gymnosperms are heterosporous. Of these statements

A. (i) and (ii) are correct but (iii) is incorrect

B. (i) and (iii) are correct but (ii) is incorrect

C. (ii) and (iii) are incorrect but (i) is correct

D. (ii) and (iii) are correct but (i) is incorrect

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4

Which one of the following is the major difference between mosses and ferns ?

A. Ferns lack alternation of generation while mosses show the same.

B. Mosses are facultative aerobes while ferns are obligate aerobes.

C. Vascular bundles of ferns show xylem vessels while those of mosses lack it.

D. Sporophytes of ferns live much longer as compared to the sporophytes of mosses.

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4

Statement 1: Double fertilization is a characteristic feature of angiosperms.
Statement 2: Double fertilization involves two fusions.

A. Both statements -1 and statement - 2 are true and statement - 2 is the correct explanation of statement - 1.

B. Both statements -1 and statement - 2 are true but statement - 2 is not the correct explanation of statement - 1.

C. Statement -1 is true and statement - 2 is false.

D. Statement -1 is false and statement - 2 is true.

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4

A research student collected certain alga and found that its cells contained both chlorophyll a and chlorophyll d as well as phycoerythrin on the basis of his observation the students conclude that the alga belongs to

A. rhodophyceae

B. bacillariophyceae

C. chlorophyceae

D. phaeophyceae

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4

Which of the following statement(s) is/are correct ?

A. In angiosperms, each embryo sac has a three-celled egg apparatus one egg cell and two synergids, three antipodal cells and two polar nuclei.

B. All seed bearing plants i.e., gymnosperms and angiosperms follow dipontic life patterns of plants.

C. In gymosperms, roots in some genera have fungal association in the form of mycorrhiza (Pinus) while in some others (Cycas) small specialized roots called coralloid are associated with N2 fixing cyanobacteria.

D. All of the above

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4

_______ represent the reproductive organs amongst gymnosperms.

A. Prothallus

B. Capsules

C. Setae

D. Cones

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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

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

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

Match column-I with column-II and choose the correct option.
Column-IColumn-II
A. AgarI. Single cell protein, used as food supplements by space travellers
B. AlginII. Red algae
C. CarrageenIII. Brown algae
D. ChlorellaIV. Gelidium, Gracilaria Spirullina

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

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

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

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

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4

Which of the following statement(s) is incorrect about mosses ?

A. The predominant stage of its life cycle is the gametophyte which consists of two stages protonema and leafy stages.

B. Leafy stage are attached to the soil through unicellular and branched rhizoids.

C. Sex organs-antheridia and archegonia are produced at the apex of the leafy shoots.

D. All of the above

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4

Laminaria (Kelp) and Fucus (Rock weed) are examples of

A. green algae

B. brown algae

C. red algae

D. golden brown algae

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4

Refer the following statement(s) and identify the group of plant which is being described by given statements ?
(i) They include various mosses and liverworts that are found commonly growing in moist shaded areas in the hills.
(ii) They lack true roots, stem or leaves.
(iii) The main plant body is haploid.
(iv) They produce a multicellular body sporophyte which is not free living but attached to the photosynthetic gametophyte and derives nourishment from it.

A. Algae

B. Fungi

C. Bryophytes

D. Pteridophytes

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4

Which of the following pteridophytes belong to class pteropsida?

A. Equisetum and Psilotum

B. Lycopodium and Adiantum

C. Selaginella and Pteris

D. Pteris and Adiantum

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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

Match column-I with column-II and select the correct answer using the codes given below.
Column-IColumn-II
(Group of Planet Kingdom)(Examples)
A. AlgaeI. Solanum tuberosum
B. FungiII. Equisetum
C. AngiospermIII. Cycas
D. PteridophyteIV. Chlamydomonas
E. GymnospermV. Rhizopus

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

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

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

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

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4

The unique feature of bryophytes compared to other plant groups is that

A. they produce spores.

B. they lack vascular tissues.

C. they lack roots.

D. their sporophyte is attached to the gametophyte.

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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

Cytological information like chromosome number, structure, behaviour are related with

A. numerical taxonomy

B. cytotaxonomy

C. chemotaxonomy

D. all of the above

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4

Mosses are of great ecological importance because of

A. its contribution to prevent soil erosion.

B. its contribution in ecological succession.

C. its capability to remove CO from the atmosphere.

D. both (a) and (b)

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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

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

Select the correct match of the feature present in column I with its respective terms given in column II.
Column-IColumn-II
A. Presence of tap roots(i) Bryophyte and coralloid roots
B. The synergids and(ii) Pteridophytes antipodal cells degenerates after fertilization
C. The food is stored as(iii) Red algae floridean starch which is very similar to amylopectin and glycogen in structure
D. Presence of sporophyte(iv) Angiosperms which is not free living but attached to the photosynthetic gametophytes and derives nourishment from it
E. Members of this group(v) Gymnosperms are used for medicinal purposes, as soil binders and frequently grown as ornamentals

A. A-i B-ii C-iii D-iv E-v

B. A-iii B-v C-ii D-iv E-i

C. A-iii B-i C-v D-ii E-iv

D. A-v B-iv C-iii D-i E-ii

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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

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

Match the column-I with column-II and choose the correct option.
Column-IColumn-II
(System of classification)(Characteristics)
A. Artificial systemI. Based on few morphological of classification characters
B. Natural systemII. Based on evolutionary of classification relationships between the various organisms
C. PhylogeneticIII. Based on natural affinities system of among the organisms and classification consider external as well as internal features.

A. A II; B I; C III

B. A I; B III; C II

C. A III; B II; C I

D. A I; B II; C III

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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.