Related Questions
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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
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
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.
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4
Which of the following statement(s) is/are correct ?
(i) Agar, one of commercial products obtained from Laminaria and Sargassum are used to grow microbes and in preparations of ice-creams and jellies.
(ii) In phaeophyceae, major pigments are chl a, d and phycoerythrin.
(iii) Pteridophytes classified into four classes : Psilopsida, Lycopsida, Sphenopsida and Pteropsida.
(iv) Gemmae are green, multicellular, asexual buds, which develop in small receptacles called gemma cups located on the thalli.
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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.
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4
Which of the following, examples belongs to the same class of algae?
A. Chara, Fucus, Polysiphonia
B. Volvox, Spirogyra, Chlamydomonas
C. Porphyra, Ectocarpus, Ulothrix
D. Sargassum, Laminaria, Gracilaria
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The heterosporous pteridophyte belonging to the class lycopsida is
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Fruits are not formed in gymnosperms because of
A. absence of pollination.
C. absence of fertilization.
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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
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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.
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If you are asked to classify the various algae into distinct groups then which of the following characters you should choose for the classification ?
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
In angiosperms, a mature male gametophyte is derived from a pollen mother cell by
A. three mitotic divisions.
B. one meiotic and two mitotic divisions.
C. two meiotic divisions.
D. a single meiotic division.
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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.
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If there are 4 cells in anther, what will be the number of pollen grains?
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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.
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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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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.
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Select the correct match of the feature present in column I with its respective terms given in column II.
Column-I | Column-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
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.
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4
What is the number and position of insertions of flagella in rhodopyceae class of algae ?
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In order to colonize land, plants needed to acquire which of the following characteristics?
A. A mechanism for moving water throughout the plant.
B. A mechanism to prevent desiccation of tissues.
C. An ability to screen ultraviolet radiation.
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Protonema and leafy stage are the predominant stage of the life cycle of
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4
Cycas and Adiantum resemble each other in having
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Match column-I with column-II and choose the correct option.
Column-I | Column-II | A. Amphibian of the | I. Sphagnum plant kingdom |
B. Specialized structures | II. Angiosperms in liverworts for asexual reproduction |
C. Monocotyledons and | III. Bryophytes dicotyledons |
D. A plant which has | IV. 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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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.
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4
Match column-I with column-II and choose the correct option.
Column-I | Column-II | A. Agar | I. Single cell protein, used as food supplements by space travellers |
B. Algin | II. Red algae |
C. Carrageen | III. Brown algae |
D. Chlorella | IV. 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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Laminaria (Kelp) and Fucus (Rock weed) are examples of
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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
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4
Match the classes of pteridophytes given in column I with their examples given in column II and choose the correct option
Column -I | Column-II | (Classes of pteridophytes) | (Examples) |
A. Psilopsida | I. Selaginella |
B. Lycopsida | II. Psilotum |
C. Sphenopsida | III. Dryopteris |
D. Pteropsida | IV. Equisetum |
A. A II; B I; C IV; D III
B. A I; B II; C IV; D III
C. A II; B I; C III; D IV
D. A II; B IV; C I; D III
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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