Planet Kingdom 1000+ MCQ with answer for SSC CHSL
Thursday 9th of March 2023
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1. Which of the following class of algae is mostly found in salt water ?
A. Phaeophyceae
B. Rhodophyceae
C. Chlorophyceae
D. Both (a) and (b)
Answer : B
A. Phaeophyceae
B. Rhodophyceae
C. Chlorophyceae
D. Both (a) and (b)
Answer : B
2. 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
Answer : A
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
Answer : A
3. Fruits are not formed in gymnosperms because of
A. absence of pollination.
B. absence of seed.
C. absence of fertilization.
D. absence of ovary.
Answer : D
A. absence of pollination.
B. absence of seed.
C. absence of fertilization.
D. absence of ovary.
Answer : D
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
Answer : A
A. Zoospore
B. Endospore
C. Hypnospore
D. None of the above
Answer : A
5. 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
Answer : B
A. Chara, Fucus, Polysiphonia
B. Volvox, Spirogyra, Chlamydomonas
C. Porphyra, Ectocarpus, Ulothrix
D. Sargassum, Laminaria, Gracilaria
Answer : B
6. Match column-I with column-II and choose the correct option.
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
Answer : B
| 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
Answer : B
7. 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
Answer : C
(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
Answer : C
8. Fusion of two gametes which are dissimilar in size is termed as _______.
A. isogamous
B. oogamous
C. anisogamous
D. agamous
Answer : C
A. isogamous
B. oogamous
C. anisogamous
D. agamous
Answer : C
9. 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.
Answer : A
(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.
Answer : A
10. Which of the following class of algae is rarely found in fresh water ?
A. Chlorophyceae
B. Phaeophyceae
C. Rhodophyceae
D. Both (a) and (b)
Answer : B
A. Chlorophyceae
B. Phaeophyceae
C. Rhodophyceae
D. Both (a) and (b)
Answer : B
11. 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
Answer : B
A. chlorophyceae
B. bryophyte
C. pteridophyte
D. gymnosperm
Answer : B
12. 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.
Answer : C
A. a cuticle and flagellated sperm.
B. vascular tissues and alternation of generations.
C. seeds and flagellated sperm.
D. alternation of generations and seeds.
Answer : C
13. 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.
Answer : D
A. they produce spores.
B. they lack vascular tissues.
C. they lack roots.
D. their sporophyte is attached to the gametophyte.
Answer : D
14. What is the similarity between gymnosperms and angiosperms?
A. Phloem of both have companian cells.
B. Endosperm is formed before fertilization in both.
C. Origin of ovule and seed is similar in both.
D. Both have leaves, stem and roots.
Answer : D
A. Phloem of both have companian cells.
B. Endosperm is formed before fertilization in both.
C. Origin of ovule and seed is similar in both.
D. Both have leaves, stem and roots.
Answer : D
15. 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
Answer : B
A. Algae
B. Bryophytes
C. Pteridophytes
D. Gymnosperms
Answer : B
16. Pyrenoids in green algal cells are related to
A. starch formation
B. protein storage
C. general metabolism
D. enzyme secretion
Answer : A
A. starch formation
B. protein storage
C. general metabolism
D. enzyme secretion
Answer : A
17. Select the correct match of the feature present in column I with its respective terms given in column II.
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
Answer : B
| 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 store 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
Answer : B
18. 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
Answer : A
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
Answer : A
19. 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
Answer : C
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
Answer : C
20. Match the column I with column II and choose the option which shows its correct combination.
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
Answer : A
| Column-I | Column-II |
|---|---|
| (Pattern of life cycle in plant) | (Examples) |
| A. Haplontic | I. Bryophytes, Pteridophytes, life cycle Ectocarpus, Polysiphonia, Kelps |
| B. Diplontic | II. Seed bearing plants life cycle (Gymnosperm and Angiosperm), Fucus |
| C. Haplo-diplontic | III. 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
Answer : A
21. Read the following statements and answer the question.
(i) Sporophytic generation is represented only by the one-celled zygote.
(ii) Meiosis in the zygote results in the formation of haploid spores.
(iii) The dominant, photosynthetic phase in such plants is free-living gametophyte.
(iv) Many algae such as Volvox, Spirogyra and some species of Chlamydomonas represent this pattern.
Which of the following pattern of life cycle of plant is described by the above statements ?
A. Haplontic
B. Diplontic
C. Haplo-diplontic
D. None of these
Answer : A
(i) Sporophytic generation is represented only by the one-celled zygote.
(ii) Meiosis in the zygote results in the formation of haploid spores.
(iii) The dominant, photosynthetic phase in such plants is free-living gametophyte.
(iv) Many algae such as Volvox, Spirogyra and some species of Chlamydomonas represent this pattern.
Which of the following pattern of life cycle of plant is described by the above statements ?
A. Haplontic
B. Diplontic
C. Haplo-diplontic
D. None of these
Answer : A
22. 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
Answer : B
A. Carolus Linnaeus
B. Bentham and Hooker
C. Engler and Prantl
D. R. H. Whittaker
Answer : B
23. Fern plant is a
A. haploid gametophyte
B. diploid gametophyte
C. diploid sporophyte
D. haploid sporophyte
Answer : C
A. haploid gametophyte
B. diploid gametophyte
C. diploid sporophyte
D. haploid sporophyte
Answer : C
24. 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
Answer : B
A. 14
B. 21
C. 28
D. 42
Answer : B
25. 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.
Answer : B
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.
Answer : B
26. Protonema and leafy stage are the predominant stage of the life cycle of
A. moss
B. dicots
C. liverwort
D. gymnosperm
Answer : A
A. moss
B. dicots
C. liverwort
D. gymnosperm
Answer : A
27. 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
Answer : D
A. Equisetum and Psilotum
B. Lycopodium and Adiantum
C. Selaginella and Pteris
D. Pteris and Adiantum
Answer : D
28. 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)
Answer : D
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)
Answer : D
29. Match column-I with column-II and select the correct answer using the codes given below.
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
Answer : B
| Column-I | Column-II |
|---|---|
| (Group of Planet Kingdom) | (Examples) |
| A. Algae | I. Solanum tuberosum |
| B. Fungi | II. Equisetum |
| C. Angiosperm | III. Cycas |
| D. Pteridophyte | IV. Chlamydomonas |
| E. Gymnosperm | V. 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
Answer : B
30. The heterosporous pteridophyte belonging to the class lycopsida is
A. Selaginella
B. Psilotum
C. Equisetum
D. Pteris
Answer : A
A. Selaginella
B. Psilotum
C. Equisetum
D. Pteris
Answer : A
31. _______ represent the reproductive organs amongst gymnosperms.
A. Prothallus
B. Capsules
C. Setae
D. Cones
Answer : D
A. Prothallus
B. Capsules
C. Setae
D. Cones
Answer : D
32. Match column-I with column-II and choose the correct option.
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
Answer : B
| 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
Answer : B
33. In bryophytes, male and female sex organs are alled ______ and ______ respectively.
A. microsporangia; macrosporangia
B. male strobili; female strobili
C. antheridia; archegonia
D. androecium; gynoecium
Answer : C
A. microsporangia; macrosporangia
B. male strobili; female strobili
C. antheridia; archegonia
D. androecium; gynoecium
Answer : C
34. Which of the following statement(s) is/are correct?
(i) Green algae are the members of chlorophyceae.
(ii) Brown algae are found primarily in marine habitates
(iii) Some red algae are found in fresh water, mostly occur in salt water, some are in brackish water.
(iv) The food in red algae is stosed as floridean starch.
(v) Red alga may occur in both well-lighted regions close to water-surface and also at great depths in oceans where light penetration is little.
A. (i) and (v) only
B. (ii), (iii) and (iv) only
C. All of the above
D. None of the above
Answer : C
(i) Green algae are the members of chlorophyceae.
(ii) Brown algae are found primarily in marine habitates
(iii) Some red algae are found in fresh water, mostly occur in salt water, some are in brackish water.
(iv) The food in red algae is stosed as floridean starch.
(v) Red alga may occur in both well-lighted regions close to water-surface and also at great depths in oceans where light penetration is little.
A. (i) and (v) only
B. (ii), (iii) and (iv) only
C. All of the above
D. None of the above
Answer : C
35. 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.
Answer : A
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.
Answer : A
36. Match the classes of pteridophytes given in column I with their examples given in column II and choose the correct option
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
Answer : A
| 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
Answer : A
37. Bryophytes are different from fungi in having
A. land habit.
B. sterile jacket layers.
C. multiflagellate gametes.
D. gametophytic plant body.
Answer : B
A. land habit.
B. sterile jacket layers.
C. multiflagellate gametes.
D. gametophytic plant body.
Answer : B
38. 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
Answer : B
(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
Answer : B
39. 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.
Answer : B
A. starch in their chloroplast.
B. vascular tissues.
C. chlorophyll.
D. cellulose in their cell walls.
Answer : B
40. Match column-I with column-II and choose the correct option.
A. A I; B II; C III; D IV
B. A IV; B III; C II; D I
C. A II; B III; C IV; D I
D. A II; B IV; C III; D I
Answer : C
| Column-I | Column-II |
|---|---|
| A. Smallest flowing plant | I. Eucalyptus |
| B. Male sex organ in | II. Wolffia flowering plant |
| C. Female sex organ | III. Stamen in flowering plant |
| D. Tallest tree | IV. Pistil |
A. A I; B II; C III; D IV
B. A IV; B III; C II; D I
C. A II; B III; C IV; D I
D. A II; B IV; C III; D I
Answer : C
41. A bryophyte differs from pteridophytes in having
A. archegonia.
B. lack of vascular tissue.
C. swimming antherozoids.
D. independent gametophytes.
Answer : B
A. archegonia.
B. lack of vascular tissue.
C. swimming antherozoids.
D. independent gametophytes.
Answer : B
42. Flagellate isogametes and anisogametes are found in
A. Spirogyra
B. Fucus
C. Volvox
D. Chlamydomonas
Answer : D
A. Spirogyra
B. Fucus
C. Volvox
D. Chlamydomonas
Answer : D
43. 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
Answer : C
(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
Answer : C
44. 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.
Answer : D
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.
Answer : D
45. 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
Answer : D
(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
Answer : D
46. 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.
Answer : D
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.
Answer : D
47. Which of the following statement(s) is/are correct about gemmae ?
(i) These are specialised structures by which asexual reproduction take place in liverworts.
(ii) They are green, multicellular and asexual buds.
(iii) They develop in small receptacles called gemma cups.
(iv) They detach from parent body and erminate to form new individuals.
A. (i) and (ii)
B. (ii) and (iii)
C. (i), (ii) and (iii)
D. All of these
Answer : D
(i) These are specialised structures by which asexual reproduction take place in liverworts.
(ii) They are green, multicellular and asexual buds.
(iii) They develop in small receptacles called gemma cups.
(iv) They detach from parent body and erminate to form new individuals.
A. (i) and (ii)
B. (ii) and (iii)
C. (i), (ii) and (iii)
D. All of these
Answer : D
48. 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
Answer : C
(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
Answer : C
49. 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.
Answer : B
A. three mitotic divisions.
B. one meiotic and two mitotic divisions.
C. two meiotic divisions.
D. a single meiotic division.
Answer : B
50. 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
Answer : B
(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
Answer : B