Diversity of Plant Life MCQs Part IV

1) The roots of Pinus seedlings are associated with
a) Fungus
b) Bacteria
c) Algae
d) Microbes

2) Plants can be made disease resistant by
a) Treatment with fungicides
b) Heat treatment of seeds
c) Causing mutation
d) Breeding with wild relatives

3) The first antibiotic isolated was
a) Terramycin
b) Neomycin
c) Penicillin
d) Streptomycin

4) Streptomycin was first isolated in 1944-45 by
a) Leeuwenhoek
b) Burkholder
c) Alexander Fleming
d) Waksman

5) The rusts are serious diseases of economically important plants. The disease is caused by the fungus
a) Puccinia
b) Agaricus
c) Rhizopus
d) Ustilago

6) The smuts of crop plants are caused by
a) Agaricus
b) Puccinia
c) Cystopus
d) Ustilago

7) The lichen is composed in part of a fungus which is
a) Autotrophic
b) Symbiotic
c) Saprophytic
d) Parasitic

8) The best example of mutualism is
a) Orchid
b) Cuscuta
c) Lichen
d) Cantahum

9) Lichens represent a symbiotic relationship between
a) Rhizobium and roots
b) Algae and higher plants
c) Algae and bacteria
d) Algae and fungi

10) Lichens show
a) Mycorrhiza relationship
b) Commensalism
c) Symbiosis of algae and fungi
d) Parasitic relation of algae and fungi

11) Lichens cannot grow where there is
a) A dry climate
b) Atmospheric pollution
c) Noncalcareous soil
d) Extreme drought

12) A lichen having a much-branched system of cylindrical or ribbon-like branches but a small thallus is called
a) Foliose lichen
b) Fruticose lichen
c) Crustaceous lichen
d) Thallose lichen

13) Which of the following is a litmus yielding lichen?
a) Cladonia rangifera
b) Roccella tinctoria
c) Lecanora esculenta
d) Cetraria islandica

14) Reindeer moss is
a lichen used as food by men. This belongs to the genus

a) Cetraria
b) Lobaria
c) Usnea
d) Cladonia

15) Lichens are the initiaters or pioneers of vegetation in a
a) Hydrosere
b) Psammosere
c) Lithosere
d) Halosere

16) Lichens reproduce by
a) Soredia
b) Gonidia
c) Conidia
d) Oidia

17) Most lichens are composed of
a) Blue-green algae and basidiomycetes
b) Blue-green algae and ascomycetes
c) Green algae and phycomycetes
d) Green algae and ascomycetes

18) Yeast is an important source of
a) Riboflavin
b) Ascorbic acid
c) Protein
d) Carbohydrate

19) What is the mode of nutrition in Rhizopus?
a) Autotrophic
b) Parasitic
c) Symbiotic
d) Saprophytic

20) Gibberellin was first discovered from
a) Algae
b) Fungi
c) Bacteria
d) Roots of higher plants

21) Gills are seen in
a) Bacteria
b) Oscillatoria
c) Ulothrix
d) Agaricus

22) The structure in which ascospores are formed is known as the
a) Basidium
b) Sporangium
c) Ascus
d) Gametangium

23) A lichen with branching form, and growing either prostrate or erect
on the ground is called

a) Crustose
b) Foliose
c) Thallose
d) Fruticose

24) Lichens participate in a
a) Xerosere
b) Halosere
c) Hydrosere
d) Psammosere

25) The fungal part of Lichens generally belongs to the class
a) Phycomycetes
b) Ascomycetes
c) Fungi imperfecti
d) Basidiomycetes

26) Fungi differ from Algae in having
a) Cell wall made up of cellulose
b) Cell wall of chitin
c) Chlorophyll
d) Starch as reserve food

27) Some haploid structures of Rhizopus include
a) Mycelia, sporangia and spores
b) Hyphae, zygote and sporangia
c) Mycelia, zygospore and spores
d) Mycelia, zygospore and suspensor

28) Saccharomyces cerevisiae is
a) Akaryote
b) Prokaryote
c) Mesokaryote
d) Eukaryote

29) Neurospora belongs to
a) Ascomycetes
b) Phycomycetes
c) Basidiomycetes
d) Deuteromycetes

30) Lichens are an indicator of pollution
a) As they are sensitive to pollution
b) As they flower well in a polluted environment
c) As they show association between algae and fungi
d) As they grow faster than other plants

31) In the diplobiontic life cycle of yeast, the number of ascospores produced
in an ascus is

a) Two
b) Four
c) Six
d) Eight

32) The mycelium is typically coenocytic in
a) Phycomycetes
b) Ascomycetes
c) Basidiomycetes
d) Basidiomycetes

33) The important active ingredients of ergot, which causes ergotism, are

a) Alkaloids
b) Nucleic acids
c) Phenols
d) Antibiotics

34) Fusion between two morphologically similar but physiologically different
thalli in fungi is known as

a) Isogamy
b) Anisogamy
c) Homothallism
d) Heterothallism

35) The reduction division in the life cycle of Rhizopus occurs
a) At the time of germination of the zygospore
b) During the formation of germ sporangium
c) During sexual reproduction
d) During the formation of gametangium

36) A group of fungi with septate mycelium in which sexual reproduction
is either unknown or lacking are classified under

a) Phycomycetes
b) Deuteromycetes
c) Ascomycetes
d) Basidiomycetes

37) Heating milk or any other liquid to
and then sudden cooling is known as

a) Sterilization
b) Pasteurization
c) Preservation
d) Fermentation

38) The common form in which food is stored in a fungal cell is
a) Glycogen
b) Starch
c) Glucose
d) Glucose

39) Which of the following fungi is the main source of vitamins?
a) Rust fungi
b) Bread Mould
c) Yeast
d) Smut fungi

40) The group of fungi related to protozoa are
a) Slime moulds
b) Bread moulds
c) Smuts
d) Rusts

41) Tikka disease occurs in
a) Rice
b) Sugarcane
c) Groundnut
d) Sorghum

42) Which of the following is not an antibiotic?
a) Griseofulvin
b) Cephalosporin
c) Citric acid
d) Streptomycin

43) Sir Alexander Fleming extracted penicillin from
a) Penicillium citrinum
b) Penicillium chrysogenum
c) Penicillium claviforme
d) Penicillium brevis

44) Lichens are good indicators of
a) Air pollution
b) Water pollution
c) Soil pollution
d) All of the above

45) Which organism exhibits extracellular digeston?
a) Cycas
b) Dryopteris
c) Funaria
d) Rhizopus

46) Rhizopus culture raised from a single spore often fails to produce
zygospores because of

a) Deficiency of oxygen
b) Absence of (+) and (-) strains of hyphae
c) Poor growth of hyphae
d) Deficiency of nutrients

47) Fungi occurring on wood are
a) Epixylic
b) Epigeal
c) Eucarpic
d) Epibiotic

48) To digest food the saprophytic fungi secretes
a) Enzymes
b) Hormones
c) Sugar
d) None of the above

49) A fungus which is normally a parasite but adopts a saprophytic mode
of life in absence of a suitable host is a

a) Parasite
b) Facultative parasite
c) Saprohyte
d) Facultative saprophyte

50) The perfect stage of a fungus is that which
a) Reproduces sexually
b) Reproduces asexually
c) Leads an independent life
d) Reproduces by azygospores

51) Smut of maize is caused by
a) Ustilago avenae
b) Ustilago maydis
c) Ustilago hordei
d) Ustilago nuda

52) The wall of the hyphae of fungi is made up of
a) Pectin
b) Chitin
c) Hemicellulose
d) Cellulose

53) The cottony thread-like filaments of fungi are called
a) Conidia
b) Mycelium
c) Hyphae
d) Sporangia

54) Albugo is found
a) In dung
b) In streams
c) In decaying organic matter
d) On the leaves of a living plant

55) Albugo is
a) An obligate intercellular pathogen
b) An intracellular parasite
c) An intercellular saprophyte
d) A facultative intercellular parasite

56) Nutritionally Albugo is a/an
a) Saprophyte
b) Facultative intercellular parasite
c) Obligate parasite
d) Facultative saprophyte

57) Which one of the following algae has the ability to fix the atmospheric nitrogen?
a) Ulothrix
b) Nostoc
c) Spirogyra
d) Oedogonium

58) Laminarin is the reserve food in the members of the family
a) Phaeophyceae
b) Chlorophyceae
c) Xanthophyceae
d) Myxophyceae

59) Algin in India is largely extracted from
a) Sargassum
b) Gelidium
c) Ulva
d) Gracillaria

60) Which of the following is the largest alga?
a) Laminaria
b) Sargassum
c) Nereocystis
d) Macrocystis

61) Mark the edible algae.
a) Porphyra
b) Nostoc
c) Laminaria
d) All

62) Mark the parasitic algae.
a) Cephaleuros
b) Ulva
c) Anabaena
d) All

63) Cell walls in algae consist of
a) Cellulose
b) Chitin
c) Cutin
d) Suberin

64) The plankton are
a) Red algae
b) A layer of organic matter
c) Floating fauna
d) Passively floating or drifting flora and fauna consisting chiefly of microscopic organisms like algae

65) The product of isogamy is known as a/an
a) Zoospore
b) Isogamete
c) Zygote
d) Sporophyte

66) The product of isogamy is known as
a) Hypnospore
b) Zoospore
c) Zygospore
d) Oospore

67) The first division of the zygote is a reduction division in
a) Algae
b) Bryophytes
c) Pteridophytes
d) Gymnosperms

68) Algae and other submerged green plants often float in water during day time and sink at night because
a) They come up to enjoy sunshine
b) They lose weight at night because fish and other animals eat away their parts
c) They become buoyant due to the accumulation of oxygen produced in photosynthesis
d) They become light due to consumption of food materials during respiration

69) The male gametes are non-motile in the algal forms belonging to
a) Chlorophyceae
b) Myxophyceae
c) Rhodophyceae
d) Phaeophyceae

70) lodine can be extracted from
a) Proteus
b) Fucus
c) Ceramium
d) Ulva

71) One of the following algae has a parenchymatous thallus:
a) Ectocarpus
b) Cladophora
c) Sargassum
d) Nostoc

72) Stellate chloroplasts are found in the cells of
a) Oedogonium
b) Chara
c) Ectocarpus
d) Zygnema

73) The algae preferred for cultivation in outer space is
a) Diatom
b) Dinoflagellates
c) Chlamydomonas
d) Chlorella

74) The pigment that imparts a red colour to Chlamydomonas in the polar regions is
a) Haematoxylin
b) Haematoxylon
c) Haematin
d) Haematochrome

75) The species of Chlamydomonas braunii and C. coccifera are peculiar in that they exhibit
a) Isogamy and anisogamy respectively
b) Anisogamy and oogamy respectively
c) Oogamy and anisogamy respectively
d) Oogamy and isogamy respectively

76) In Ulothrix, the reduction division occurs
a) In the gamete
b) In the zygospore
c) In the zoospore
d) In the somatic cells

77) The number of flagella in the gamete of Ulothrix is
a) Six
b) Four
c) One
d) None of the above

78) Ulothrix produces isogametes that are
a) Quadriflagellate
b) Non-flagellate
c) Biflagellate
d) Multiflagellate

79) Name the organism that lacks an .archegonium
a) Funaria
b) Pteris
c) Cycas
d) Spirogyra

80) Which one of the following statements concerning the algae is wrong?
a) Most algae are photosynthetic
b) Algae can be classified according to their pigments
c) All algae are filamentous
d) Spirogyra reproduces sexually.

81) The lateral conjugation of Spirogyra involves participation of
a) Apical and basal cells of filament
b) Male and female cells only
c) Two adjacent cells of a filament
d) Any two cells of a filament

82) A unicellular green alga is
a) Ulothrix
b) Spirogyra
c) Chlamydomonas
d) All except b

83) The colour of “red snow” is due to
a) Chlamydomonas snowiae
b) Chlamydomonas nivalis
c) Both A and B
d) None of the above

84) Pyrenoids store food as
a) Glycogen
b) Fats
c) Oil globules
d) Starch

85) Chlamydomonas is a
a) Eukaryote
b) Prokaryote
c) Both A and B
d) None of the above

86) Thin walled resting spores produced by Chlamydomonas under dry conditions are
a) Meiospores
b) Aplanospores
c) Hypnospores
d) Zygospores

87) A motile flagellate asexual spore is known as
a) Zoospore
b) Zygospore
c) Tetraspore
d) Zygote

88) During zoospore formation Chlamydomonas
a) Develops a very thick wall
b) Loses the chloroplast
c) Loses its flagella
d) All the above

89) During favourable conditions, the most common mode of multiplication in Chlamydomonas is by producing
a) Gametes
b) Zoospores
c) Aplanospores
d) Hypnospores

90) The number of zoospores produced from a Chlamydomonas cell is
a) 2,4,8, or 16
b) 32 or 64
c) only one
d) None

91) The mechanism which is involved in zoospore formation in Chlamydomonas is called
a) Cell division
b) Binary fission
c) Budding
d) Bipartition

92) The gametangia and sporangia of Ulothrix are
a) Jacketed and multicellular
b) Non-jacketed and unicellular
c) Non-jacketed and multicelular
d) Jacketed and unicellular

93) An important difference between the zoospores and aplanospores is that
a) Aplanospores are uninucleate while zoospores are binucleate
b) Aplanospores are smaller while zoospores are larger
c) Aplanospores are non-motile while zoospores are motile
d) None the above

94) Phycobilins absorb light of wavelength 500-650 nm
a) 670-700 mm
b) 610-650 nm
c) 500-650 nm
d) 420-520 nm

95) A Chlamydomonas plant is left exposed in mud. What would be its means of survival ?
a) Formation of aplanospores
b) Palmella stage
c) Formation of hypnospores
d) All the above

96) The structures which help algae to tide over drought are
a) Zoospores, aplanospores, hypnospores
b) Zoospores, akinetes and zygospores
c) Aplanospores, hypnospores, zygospores
d) None of the above

97) Chlamydomonas shows
a) Isogamy
b) Anisogamy
c) Oogamy
d) All the above

98) In isogamous species, the gametes of Chlamydomonas undergo temporary clustering before they depart in pairs. The phenomenon is called
a) Gametic differentiation
b) Clumping
c) Homothallism
d) Parthenogenesis

99) Isogamy is a mode of sexual reproduction in which
a) The fusing gametes are similar morphologically as well as physiologically
b) One of the two fusing gametes is comparatively smaller
c) The gametes are similar in structure and size but different in behaviour
d) The fusing gametes are dissimilar in all respects

100) Three filaments of spirogyra involved in conjugation may have
a) The middle filament female and the outer filaments male
b) The middle filament male and the outer filaments female
c) Outer filaments are mixed or monoecious
d) Both A and B


Leave a Comment

This site uses Akismet to reduce spam. Learn how your comment data is processed.

Do you want regular updates on Science & Technology and Up to date General knowledge?

Join HourlyBook Newsletter, to update skills in Science and Technology and keep updated with current trends. You will receive regular updates on:

  • Latest Science & Technology Articles
  • Updates on Medical & Engineering Entrance Exams Worldwide
  • Tips and Tricks to Day to Day useful topics
Close this popup