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Planet Kingdom MCQ Solved Paper for SSC Scientific Assistant

Thursday 9th of March 2023

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1. 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.
Answer : D
2. 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
Answer : B
3. 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
4. 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
5. 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
Answer : B
6. 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
7. Cycas and Adiantum resemble each other in having
A. seeds
B. motile sperms
C. cambium
D. vessels
Answer : B
8. 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
9. 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
10. 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
11. 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
12. 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.
Answer : C
13. Cytological information like chromosome number, structure, behaviour are related with
A. numerical taxonomy
B. cytotaxonomy
C. chemotaxonomy
D. all of the above
Answer : B
14. Match the classes of pteridophytes given in column I with their examples given in column II and choose the correct option
Column -IColumn-II
(Classes of pteridophytes)(Examples)
A. PsilopsidaI. Selaginella
B. LycopsidaII. Psilotum
C. SphenopsidaIII. Dryopteris
D. PteropsidaIV. 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
15. 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
Answer : B
16. Which of the following statements (i) - (v) are correct ?
(i) In Equisetum, the female gametophyte is retained on the parent sporophyte.
(ii) In Ginkgo, male gametophyte is not independent.
(iii) The sporophyte in Riccia is more developed than that in Polytrichum.
(iv) Sexual reproduction in Volvox is isogamous.
A. Two
B. Three
C. Four
D. One
Answer : A
17. 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
Answer : A
18. Classification of plants proposed by Carolus Linnaeus was artificial because it was based on
A. only a few morphological characters.
B. evolutionary tendencies which are diverse.
C. anatomical characters which are adaptive in nature.
D. physiological traits alongwith morphological characters.
Answer : A
19. 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
20. 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
Answer : B
21. 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
22. 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
23. 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
24. 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
25. Fusion of two gametes which are dissimilar in size is termed as _______.
A. isogamous
B. oogamous
C. anisogamous
D. agamous
Answer : C
26. 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
27. 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
28. 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.
A. Both (i) and (ii)
B. Both (ii) and (iv)
C. Both (iii) and (iv)
D. All of these
Answer : C
29. 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 ncorrect
D. (iii) is correct, but (i) and (ii) are incorrect
Answer : D
30. 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.
Answer : B
31. Protonema and leafy stage are the predominant stage of the life cycle of
A. moss
B. dicots
C. liverwort
D. gymnosperm
Answer : A
32. Laminaria (Kelp) and Fucus (Rock weed) are examples of
A. green algae
B. brown algae
C. red algae
D. golden brown algae
Answer : B
33. Bryophytes are different from fungi in having
A. land habit.
B. sterile jacket layers.
C. multiflagellate gametes.
D. gametophytic plant body.
Answer : B
34. 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
Answer : A
35. Which of the following statements with respect to algae are correct.
(i) Fusion between one large, non-motile female gamete and a smaller, motile male gamete is termed as oogamous.
(ii) Fusion of two gametes dissimilar in size is termed as oogamous.
(iii) Fusion of two gametes similar in size is called anisogamous.
(iv) In chlorophyceae, the major pigments are chlorophyll a and b , and the food is stored as starch.
(v) In rhodophyceae, the major pigments are chlorophyll a and d , and the food is stored as mannitol.
A. (i) and (v)
B. (iii) and (v)
C. (i) and (ii)
D. (i) and (iv)
Answer : D
36. 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
37. 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
38. A bryophyte differs from pteridophytes in having
A. archegonia.
B. lack of vascular tissue.
C. swimming antherozoids.
D. independent gametophytes.
Answer : B
39. 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.
D. Both (b) and (c)
Answer : D
40. 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.
Answer : B
41. 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
42. 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
43. 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
Answer : D
44. 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)
Answer : D
45. _______ represent the reproductive organs amongst gymnosperms.
A. Prothallus
B. Capsules
C. Setae
D. Cones
Answer : D
46. If you are asked to classify the various algae into distinct groups then which of the following characters you should choose for the classification ? br>A. Nature of habitat
B. Structural organization of thallus
C. Chemical composition of the cell wall
D. Types of pigments present in the cell.
Answer : D
47. 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.
Answer : A
48. 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
49. Which one of the following is a correct statement?
A. Pteridophyte gametophyte has a protonemal and leafy stage.
B. In gymnosperms, female gametophyte is free-living.
C. Antheridiophores and archegoniophores are present in pteridophytes.
D. Origin of seed habit can be traced in pteridophytes.
Answer : D
50. 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
Answer : C
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