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 Multiple Choice QuestionsMultiple Choice Questions

31.

Select the correct statements from the following regarding asexual reproduction.

I. It is slower than sexual reproduction.

II. It involve a single parent.

III. It produces progeny that are genetically identical with the parent.

IV. Clones are the progeny of asexual reproduction

  • I, II, III, IV

  • I, II, IV

  • I, II, III

  • II, III, IV


D.

II, III, IV

Statement II, III and IV are correct. 

Asexual reproduction is a rapid mode of reproduction involving single parent. Since, no meiosis and gametic fusion occur, genetic variation is not observed in offspring. These are clones of their parent and are genetically identical. It is a uniparental phenomenon. The organisms increase their mass and maturity until at a critical point. They reproduce by simple division of their substance. Each successive organism has the same physio-chemical constitution as the parent.


32.

Which of the following pairs is not correctly matched?

  • Mode of reproduction                               Example
    Offset                                                        Water hyacinth

  • Mode of reproduction                               Example
    Rhizome                                                     Banana
  • Mode of reproduction                                       Example 
    Binary fission                                                      Sargassum 
  • Mode of reproduction                                    Example
    Conidia                                                            Penicillium


C.

Mode of reproduction                                       Example 
Binary fission                                                      Sargassum 

The plant body Sargassum is a diploid sporophyte.  It does not multiply asexually by means of spores. Instead it reproduce by vegetative means, i.e. fragmentation which is the only known method of vegetative reproduction in the free floating species of Sargassum. 

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33.

Select the correct statement regarding reproduction

  • Mating in dogs is synchronised with lunar cycle.

  • Salamanders always have internal fertilisation.

  • In Trygon, the male introduces sperms into female through a modified pelvic fin.

  • Catla has internal fertilisation


C.

In Trygon, the male introduces sperms into female through a modified pelvic fin.

Mating in dogs is not synchronised with lunar cycle. Six of the nine families of Salamanders have internal fertilisation. Catla has external fertilisation.


34.

Neoteny refers to

  • development of gonads

  • moulting

  • metamorphosis

  • retention of larval traits in the adult body


D.

retention of larval traits in the adult body

Neoteny refers to retention of some larval or immature character in adulthood. The development of the gonads is a part of the development of reproductive system and ultimately forms the testes in males and ovaries in females.

Moulting is the manner in which an animal routinely casts off a part of its body either at specific times of the year, or at specific points in its life cycle. Metamorphosis is a biological process by which an animal physically develops after birth or hatching.


35.

Oogamous type of reproduction is seen in

(i) Fucus

(ii) Anabaena

(iii) Nostoc

(iv) Volvox

  • (i) only

  • (i) and (ii) only

  • (i) and (iii) only

  • (iii) only

  • (iii) only


E.

(i) and (iv) only

Fucus and Volvox have oogamous type of sexual reproduction.


36.

Match the following and choose the correct combination from the options given

Column I Column II
A. Yeast 1. Reproductive by true regenration
B. Planaria 2. Reproduce by budding
C. Mules 3. Multiply by fragmentation
D. Protonema 4. Do not reproduce

  • A - 1; B - 2; C - 3; D - 4

  • A - 4; B - 3; C - 1; D - 4

  • A - 4; B - 1; C - 2; D - 3

  • A - 2; B - 1; C - 4; D - 3

  • A - 2; B - 1; C - 4; D - 3


E.

A - 2; B - 1; C - 4; D - 3

Column I Column II
A. Yeast 2. Reproductive by true regeneration
B. Planaria 1. Reproduce by budding
C. Mules 4. Do not reproduce
D. Protonema 3. Multiply by fragmentation

37.

Which of the following organisms breeds only once in lifetime?

  • Bamboo

  • Oysters

  • Pelagic fishes

  • Birds

  • Birds


A.

Bamboo

Bamboo species flower only once in their life time, generally after 50 - 100 years, produce large numbers of fruits and die.


38.

Which among the following is not a prokaryote?

  • Saccharomyces

  • Mycobacterium

  • Oscillatoria

  • Nostoc


A.

Saccharomyces

  1. Saccharomyces i.e. yeast is a eukaryote (unicellular fungi)
  2. Mycobacterium – a bacterium
  3. Oscillatoria and Nostoc are cyanobacteria

39.

Which one of the following matches is correct?

  • Phytophthora Aseptate mycelium Basidiomycetes
  • Alternaria Sexual reproduction Deuteromycetes

  • Mucor Reproduction by conjugation Asocmycetes
  • Agaricus Parasitic fungus Basidiomycetes

B.

Alternaria Sexual reproduction Deuteromycetes

(i) Phytophthora belongs to Phycomycetes (algal fungi). They contain either unicellular thallus or non-separate coenocytic mycelium. They are mostly plant damaging Oomycetes (water molds).
(ii) Alternaria is Deuteromycetes (fungi imperfecti), which lacks sexual reproduction.
(iii) Mucor also belong to Phycomycetes. They have mycelium which is coenocytic (multinucleate) and profusely branched. They reproduce vegetatively via conjugation.
(iv) Agaricus belongs to Basidiomycetes (where karyogamy and meiosis occur). They contain well-developed filaments, branched and septate mycelium. They are saprophytic but parasitic.
So, hence (b) option is correctly matched.

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