CBSE Questions for Class 12 Medical Biology Reproduction In Organisms Quiz 1 - MCQExams.com

Which of the following is wrong statement?
  • Isogametes are similar in structure, function and behavior.
  • Anisogametes differ either in structure, function or behavior.
  • In oomycetes female gamete is smaller and motile, while male gamete is larger and non-motile.
  • Chlamydomonas exhibits both isogamy and anisogamy and Fucus shows oogamy.
Fertilization is fusion of
  • Diploid spermatozoan with diploid ovum to form diploid zygote
  • Haploid spermatozoan with diploid ovum to form diploid zygote
  • Diploid spermatozoan with haploid ovum to form diploid zygote
  • Haploid spermatozoan with haploid ovum to form diploid zygote
The vegetative reproduction in Bryophyllum takes place through which part of the plant?
  • Root
  • Stem
  • Leaf
  • Seed
Regarding fertilization which among the following statements is incorrect
  • It restores diploid condition in the zygote
  • It activates egg both physiologically and metabolically
  • Paternal and maternal sets contribute to the diploid number without causing any variation
  • It determines the sex of the offspring
Formation of an organism from a single, male gamete without fusion with egg is an example of
  • Parthenogenesis
  • Apogamy
  • Apospory
  • Parthenocarpy
In sexual reproducing animals, the union of male and female gamete forms a cell, which is called as
  • Ovarian cell
  • Oocyte
  • Zygote
  • Graafian follicle
A polyoestrus animal is
  • Man
  • Cat
  • Rabbit
  • Horse
Fusion of dissimilar gametes is
  • Allogamy
  • Dichogamy
  • Autogamy
  • Fertilization
Which of the following is the part through vegetative propagation occur in a jasmine plant?
  • Stem
  • Root
  • Flower
  • Leaf
The word estrus means
  • Heat
  • Blood
  • Hormone
  • None of the above
Which of the following describes the development of an egg without a sperm?
  • Binary fission
  • Budding
  • Spore formation
  • Vegetative propagation
  • Parthenogenesis
Seedless fruits in Banana are produced through
  • Asexual reproduction
  • Parthenogenesis
  • Triploid
  • Cross pollination
Nonprimate mammals have
  • Menstrual cycle
  • Oestrus cycle
  • Breeding seasons
  • Non breeding seasons
Development of animal embryo from an unfertilized egg is called _________.
  • Parthenocarpy
  • Parthenogenesis
  • Apospory
  • Apomixis
Fertilization is fusion of
  • Diploid spermatozoan with diploid ovum to form a diploid zygote
  • Haploid spermatozoan with diploid ovum to form a diploid zygote
  • Diploid spermatozoan with haploid ovum to form a diploid zygote
  • Haploid spermatozoan with haploid ovum to form a diploid zygote
In honey bees, males (drones) are formed from
  • Unfertilized eggs
  • Fertilized eggs
  • Embryo
  • None of the above
The phenomenon of fertilization was first perceived by 
  • Weismann
  • Leeuwenhoek
  • Robert Hooke
  • Hertwig
Cinchona plant is also known as
  • Prickly bark
  • Turmeric bark
  • Peruvian bark
  • Devil's dung bark
Plants reproduce without fertilization through:
  • Vegetative propagation
  • Budding
  • Pollination
  • Binary fission 
Development of an embryo without fertilization is called:
  • Gametogenesis
  • Metagenesis
  • Oogenesis
  • Parthenogenesis
In oogamy, fertilization involves:
  • A large non-motile female gamete and a small non-motile male gamete
  • Large motile female gamete and a small non-motile male gamete
  • A small non-motile female gamete and a large motile male gamete
  • A large non-motile female gamete and a small motile male gamete
In some species, parthenogenesis may alternate with sexual reproduction. This process is called as
  • Complete parthenogenesis
  • Incomplete or cyclic parthenogenesis
  • Both A and B
  • Alternation generation
Among the following, which one is not a method of vegetative propagation?
  • Budding
  • Layering
  • Sowing
  • Tissue culture
Sometime prothallus of fern give rise to a fern plant. It is an example of
  • Apospory
  • Parthenogenesis
  • Parthenocarpy
  • Apogamy
Arrhenotoky is related to 
  • Parthenogenesis
  • Wax formation
  • Both A and B
  • None of the above
Natural parthenogenesis occurs in
  • Frog 
  • Honeybee to produce drones
  • Sea urchin 
  • All of the above
Which type of stimulus is used to achieve parthenogenetic development?
  • Chemical
  • Change in pH
  • Pricking with microneedle
  • All of the above
Female rabbit is 
  • Monoestrous
  • Diestrous
  • Polyestrous
  • None of the above
Regeneration is same as fragmentation. 
  • True
  • False
Normally the number of chromosomes in the nuclei of gametes, that fuse at fertilization are 
  • Innumerable
  • Dissimilar
  • Similar
  • None of the above
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