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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

Correct Answer :

C. antheridia; archegonia


In bryophytes, sex organs are of two types, male antheridium and female archegonium. They are multicellular and jacketed, i.e., covered by jacket of sterile cells.

Related Questions

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Which one of the following term is correctly matched with their definition in Pinus ?

A. Monoecious Male (microsporangiate) and female (megasporangiate) cones are produced on same plant.

B. Monoecious Male and female sporophylls borne on same strobilus.

C. Dioecious Male and female cones are produced on different plants.

D. Monoecious Micro and megasporocarp develop on same plant.

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4

Statement 1: Members of phaeophyceae vary in colour from olive green to various shades of brown.
Statement 2: Phaeophyceae possess chlorophyll a, c, carotenoids and xanthophylls.

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

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

Which of the following groups of plants play an important role in plant succession on bare rocks/soil ?

A. Algae

B. Bryophytes

C. Pteridophytes

D. Gymnosperms

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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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The spreading of living pteridophytes is limited and restricted to narrow geographical region because

A. gametophytic growth needs cool, damp and shady places.

B. it requires water for fertilization.

C. due to absence of stomata in leaf and absence of vascular tissue.

D. both (a) and (b)

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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

Angiosperms have dominated the land flora primarily because of their

A. power of adaptability in diverse habitat.

B. property of producing large number of seeds.

C. nature of self pollination.

D. domestication of man.

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4

If you are asked to classify the various algae into distinct groups then which of the following characters you should choose for the classification ?

A. Nature of habitat

B. Structural organization of thallus

C. Chemical composition of the cell wall

D. Types of pigments present in the cell.

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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 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

Which of the following group of plant is being described by given statements ?
(i) The plant body is thalloid.
(ii) Asexual reproduction takes place by fragmentation of thalli, or by the formation of specialized structures called gemmae.
(iii) The sporophyte is differentiated into a foot, seta and capsule.
(iv) They grow usually in moist and shady habitats.

A. Liverworts

B. Moss

C. Fern

D. Gymnosperm

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4

In class phaeophyceae, the plant body is usually attached to the substratum by a A and has a stalk, the B and leaf like photosynthetic organ-the C .

A. A holdfast, B stipe, C frond

B. A stipe, B holdfast, C frond

C. A frond, B stipe, C holdfast

D. A stipe, B frond, C holdfast

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4

Consider the following statements regarding the major pigments and stored food in the different groups of algae and choose the correct option
(i) In chlorophyceae, the stored food material is starch and the major pigments are chlorophyll-a and d.
(ii) In phaeophyceae, laminarian is the stored food and major pigments are chlorophyll-a and b.
(iii) In rhodophyceae, floridean starch is the stored food and the major pigments are chlorophyll-a, d and phycoerythrin.

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

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

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

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

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4

A universal feature of the life cycle of plants is

A. morphologically identical haploid and diploid stages.

B. genetically identical haploid and diploid stages.

C. alteration of generations between heteromorphic haploid gametophytes and diploid sporophytes.

D. none of the above

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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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Protonema and leafy stage are the predominant stage of the life cycle of

A. moss

B. dicots

C. liverwort

D. gymnosperm

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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

The Natural system of classification for flowering plants was given by

A. Carolus Linnaeus

B. Bentham and Hooker

C. Engler and Prantl

D. R. H. Whittaker

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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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Flagellate isogametes and anisogametes are found in

A. Spirogyra

B. Fucus

C. Volvox

D. Chlamydomonas

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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

Which of the following group of plant is being described by the given statements ?
(i) They are plants in which the ovules are not enclosed by any ovary wall and remain exposed before and after fertilization.
(ii) The giant red wood tree Sequoia is one of the tallest tree species of the group.
(iii) The roots are generally tap roots.
(iv) They are heterosporous and they produce haploid microspores and megaspores.

A. Algae

B. Bryophytes

C. Gymnosperms

D. Pteridophytes

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Which of the following statement is incorrect ?

A. Double fertilization is unique to gymnosperms and monocotyledons.

B. Sequoia, a gymnosperm, is one of the tallest tree species.

C. Phaeophyceae members possess chlorophyll a, c, carotenoids and xanthophylls.

D. Moss is a gametophyte which consists of two stages namely, protonemal stage and leafy stage.

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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

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

A. isogamous

B. oogamous

C. anisogamous

D. agamous

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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

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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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.