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Class 12 Biology Objective In English Chapter – 1 Reproduction in Organisms
1. Gametes are usually
( A ) Haploid
( B ) Diploid
( C ) Polyploid
( D ) Nulliploid
Ans-( A )
2. Yeast reproduces by means of
( A ) Budding
( B ) Fragmentation
( C ) Pollination
( D ) All of these
Ans-( A )
3. Flowers of Vallisneria spp are
( A ) Anemophilous
( B ) Entomophilous
( C ) Hydrophilous
( D ) Zoophilous
Ans-( C )
4. Reproduction by budding occurs in
( A ) Yeast
( B ) Paramoecium
( C ) Penicillium
( D ) All of these
Ans-( A )
5. What is the number of chromosomes present in human gametes
( A ) 21
( B ) 23
( C ) 44
( D ) 46
Ans-( B )
6. Oviparous are :
( A ) Hen
( B ) Snake
( C ) Crocodile
( D ) All of these
Ans-( D )
7. Diploid is :
( A ) Ovum
( B ) Pollen
( C ) Both A and B
( D ) Zygotes
Ans-( D )
8. Aril is edible in which of the following fruits ?
( A ) Myristica
( B ) Litchi
( C ) Annona
( D ) All of these
Ans-( B )
9. Which one of the following is insectivorous plant ?
( A ) Drosera
( B ) Nepenthes
( C ) Both A & B
( D ) Hydrila
Ans-( B )
10. One meiosis produces how many male gametes ?
( A ) 4
( B ) 1
( C ) 2
( D ) 8
Ans-( D )
11. MMC has 24 chromosomes . What will be the number of chromosomes in its endsoperm ?
( A ) 12
( B ) 24
( C ) 36
( D ) 48
Ans-( C )
12. Ephyra larva found in Aurelia is formed by :
( A ) Regeneration
( B ) Segmentation
( C ) Fragmentation
( D ) Strobilation
Ans-( D )
13. Strobilanthus Kunthiana ( Neelak uranji ) flowers once in 12 years . The last time this plant flowered during september – october 2006. It is found in hilly areas in :
( A ) Kerala and Kamataka
( B ) Orissa
( C ) Andhra Pradesh
( D ) Maharashtra
Ans-( A )
14. Gerontology means study of :
( A ) birds
( B ) bones
( C ) ageing
( D ) earth
Ans-( C )
15. Endosperm provides food to the growing :
( A ) seeds
( B ) fruit
( C ) endosperm
( D ) embryo
Ans-( D )
16. Which one in the following is called ” Terror of Bengal ” ?
( A ) Eichhornia
( B ) Penicillium
( C ) Bambusa
( D ) others
Ans-( A )
17. The plants which flower and fruit only once in their life are
( A ) Monocarpic
( B ) Polycarpic
( C ) Vegetative plants
( D ) reproductive plants
Ans-( A )
18. Polyembryony commonly occurs in
( A ) banana
( B ) tomato
( C ) potato
( D ) Citrus
Ans-( D )
19. Lever mechanism of pollination is found in :
( A ) Antirrhinum
( B ) Ficus
( C ) Wheat
( D ) Salvia
Ans-( D )
20. Pollination induces the abscission of all floral organs except one . That organ is :
( A ) anther
( B ) pistil
( C ) sepals
( D ) receptacles
Ans-( B )
21. Process of fusion of haploid cells is :
( A ) Cell cycle
( B ) Meiosis
( C ) Mitosis
( D ) Syngamy
Ans-( D )
22. Which one undergoes longitudinal binary fission ?
( A ) Euglena
( B ) Plasmodium
( C ) Planaria
( D ) Paramoecium
Ans-( A )
23. What would be chromosome number of cells in aleurone layer if megaspore mother cell has ten chromosomes ?
( A ) 10
( B ) 15
( C ) 20
( D ) 25
Ans-( B )
24. What would be the number of chromosomes in the cells of the aleurone layer in a plant species with 8 chromosomes in its synergids ?
( A ) 16
( B ) 24
( C ) 32
( D ) 8
Ans-( B )
25. When offspring in formed by single parent , then it is called :
( A ) Sexual reproduction
( B ) Asexual reproduction
( C ) Both ( A ) & ( B )
( D ) Internal fertilization
Ans-( B )
26. Which of following plants is monoecious ?
( A ) Papaya
( B ) Date palm
( C ) Coconut
( D ) Two of above
Ans-( C )
27. Which are hermaphrodite ?
( A ) Earthworm , Hydra and Leech
( B ) Cockroach , Ascaris and Hydra
( C ) Earthworm , Ascaris and Leech
( D ) Ascaris , Cockroach and Hydra
Ans-( A )
28. Formation of the whole body of an organism from a small fragment is called :
( A ) morphallaxis
( B ) epimorphosis
( C ) morphogenesis
( D ) metabolism
Ans-( A )
29. The chromosome number is haploid in :
( A ) zygote
( B ) gametes
( C ) embryo
( D ) seed
Ans-( B )
30. In Angiosperms , how many male gametes are formed in pollen tube
( A ) one
( B ) two
( C ) three
( D ) infinite
Ans-( B )
31. The term dioecious is used t describe :
( A ) bisexual condition
( B ) unisexual condition
( C ) hermaphrodite condition
( D ) gynandromorph
Ans-( B )
32. Double fertilization is found in :
( A ) angiosperms
( B ) gymnosperms
( C ) pteridophytes
( D ) bryophytes
Ans-( A )
33. In plants , meiosis occurs in :
( A ) root tip
( B ) pollen grain
( C ) stem tip
( D ) anther
Ans-( D )
34 .Seeds are called products of sexual reproduction because they :
( A ) are formed by fusion of gametes
( B ) give rise to new plants
( c ) can be stored for long time
( D ) are formed by fusion of pollen tubes
Ans-( A )
35. Bamboo species flower :
( A ) only once in lifetime
( B ) lonce in 12 years
( C ) every year
( D ) twice in 50-100 yrs
Ans-( A )
36. Chromosome number in meiocyte Drosophila ( fruit fly ) is
( A ) 2
( B ) 4
( C ) 6
( D ) 8
Ans-( D )
37. Life span of crocodile and may fly is respectively :
( A ) 15 years , 1 week
( B ) 30 years , 1 week
( C ) 45 years , 1 month
( D ) 60 years , 1 day
Ans-( D )
38. The nodes are called ” eyes ‘ which will form a new plant in :
( A ) Ginger
( B ) Bryophyllum
( c ) Alocasia
( D ) Potato
Ans-( D )
39. Ciliate motile spores are called :
( A ) aplanospores
( B ) conidia
( C ) zoospores
( D ) ospores
Ans-( C )
40. Where two gametes are similar in appearance , they are called :
( A ) Isogametes
( B ) Heterogametes
( C ) Anisogametes
( D ) Exogamy
Ans-( A )
41. Chromosome number in meiocyte of human beings is :
( A ) 40
( B ) 42
( C ) 44
( D ) 46
Ans-( D )
42. Sexual reproduction is responsible for :
( A ) restoring diploid condition
( B ) creation of identical young ones
( C ) no any role in evolution
( D ) restoring haploid condition
Ans-( A )
43. Amphimixis is :
( A ) reaction of antifertilizin and fertilizin
( B ) fusion of male and female pronuclei
( C ) formation of reception cone by ovum
( D ) penetration of sperm into ovum
Ans-( B )
44. Sporogenesis is :
( A ) development and formation of spores
( B ) production of mitospores
( C ) production of meiospores
( D ) formation of zygote and embryo
Ans-( A )
45. Which is diploid structure ?
( A ) Pollen grains
( B ) Egg
( c ) Megaspore
( D ) MMC
Ans-( D )
46. Vegetative propagation occurs in Mint through :
( A ) Suckers
( B ) Runners
( C ) offsets
( D ) Rhizome
Ans-( A )
47. Maximum life span of Dog is :
( A ) 20 years
( B ) 15 years
( C ) 10 years
( D ) 5 years
Ans-( A )
48. Scion is grafted on stalk . Quality of fruits produced will depend upon genotype of :
( A ) Scion
( B ) Stalk
( C ) Both A and B
( D ) None of the above
Ans-( A )
49. Process of fusion of haploid cells is
( A ) Cell cycle
( B ) Meiosis
( C ) Mitosis
( D ) Syngamy
Ans-( D )
50 . is vegetatively propagated by leaf segments ?
( A ) Agave and Kalanchoe
( B ) Bryophyllum and Kalanchoe
( C ) Asparagus and Bryophyllum
( D ) Chrysanthemum and Agave
Ans-( B )
51. The maximum number of chromo some in a flowering plant ( = Poa litorosa ) is 2n = 265 , then the minimum number is :
( A ) 2n = 4
( B ) 2n = 14
( C ) 2n = 2
( D ) 2n = 16
Ans-( A )
52. Maize has 10 pair chromosomes . How many linkage groups would it have ?
( A ) 20
( B ) 40
( C ) 10
( D ) 5
Ans-( C )
53. In which of the following species of plants seeds are produced through apomixis :
( A ) Asteraceae and Grass
( B ) Mustard
( C ) Citrus and Mango
( D ) None of these
Ans-( A )
54. Which of the following animals , is / are ovo – viviparous :
( A ) Hen
( B ) Platypus
( C ) Rattle snake
( D ) Echidna
Ans-( C )
55. Parthenogenesis occurs in :
( A ) Axolotle Larva
( B ) Miracidium
( C ) Cercaria
( D ) Sporocyst and redia larva
Ans-( D )
56. When male differs from female in morphology , it is called :
( A ) heterogamy
( B ) homogamy
( C ) sexual dimorphism
( D ) hermaphorditism
Ans-( C )
57. Paedogenesis is found in the larvae of :
( A ) Taenia
( B ) Fasciola
( C ) Rana
( D ) Butterfly
Ans-( B )
58. Oblique binary fission is found in :
( A ) Monocystis
( B ) Plasmodium
( C ) Planaria
( D ) Ceratium
Ans-( D )
59. Which one has the capacity to reproduce without fertilization of f 1 eggs ?
( A ) Spider
( B ) Crow
( C ) Honey bee
( D ) Earthworm
Ans-( C )
60. In animals , juvenile phase is followed by :
( A ) vegetative phase
( B ) rep ductive phase
( C ) senescent phase
( D ) old age
Ans-( B )
61. Which is the correct sequence ?
( A ) Gametogenesis – syngamy embryogenesis – zygote
( B ) Syngamy – gametogenesis zygote – embryogenesis
( C ) Gametogenesis – syngamy zygote – embryogenesis
( D ) zygote – embryogenesis syngamy – gametogenesis
Ans-( C )
62. The term homothallic and monoecious are used to denote
( A ) Bisexual condition
( B ) Unisexual condition
( C ) Staminate flowers
( D ) Pistillate flowers
Ans-( A )
63. What is the maximum age of parrot ?
( A ) 90 years
( B ) 25 years
( C ) 500 years
( D ) 140 years
Ans-( D )
64. No individual is immortal , except :
( A ) single – celled organisms
( B ) green plants
( C ) sponges
( D ) cyanobacteria
Ans-( A )
65. The offspring exactly identical to one another as well as identical to their parents is :
( A ) twins
( B ) replicates
( C ) drones
( D ) clone
Ans-( D )
66. Find the correct combination in the following :
( A ) Zoospore in Sponge
( B ) Gemmules in Pencilium
( C ) Conidia in Algae
( D ) Buds in Hydra
Ans-( D )
67. Grafting in Monocots is rarely successful because :
( A ) Monocots have closed vascular bundles
( B ) Monocots are without cambium
( C ) Monocots are herbaceous
( D ) Monocots have parallel venation
Ans-( B )
68. Grafting in sugarcane can not be performed because :
( A ) Vascular bundles are scattered
( B ) Phloem is internal to xylem
( C ) Sugarcane plant is delicate
( D ) It is unable to bear injury
Ans-( A )
