Hydra usually reproduces by:
  • fragmentation and budding
  • regeneration and budding
  • multiple fission and fragmentation
  • regeneration
Tubectomy is carried out by blocking the
  • oviduct
  • uterus
  • cervix
  • vagina
Variations occur as a result of
  • asexual reproduction
  • vegetative propagation
  • sexual reproduction
  • regeneration
Fertilisation occurs in human female when the sperms and ovum reach simultaneously at
  • fallopian tube
  • uterus
  • vagina
  • cervix
AIDS is a sexually transmitted disease caused due to an infection by a
  • bacteria
  • protozoa
  • virus
  • Plasmodium
In the list of organisms given below, those that reproduce by the asexual method are
  • (ii) and (iv)
  • (i), (iii) and (iv)
  • (i) and (iv)
  • (ii), (iii) and (iv)
Which of the following is the correct sequence of events of sexual reproduction in a flower?
  • pollination, fertilisation, seedling, embryo
  • seedling, embryo, fertilisation, pollination
  • pollination, fertilisation, embryo, seedling
  • embryo, seedling, pollination, fertilisation
Offspring formed by asexual method of reproduction have greater similarity among themselves because
  • (i) and (ii)
  • (i) and (iii)
  • (ii) and (iv)
  • (iii) and (iv)
Characters that are transmitted from parents to offspring during reproduction show
  • only similarities with parents
  • only variations with parents
  • both similarities and variations with parents
  • neither similarities nor variations
In Spirogyra, asexual reproduction takes place by
  • breaking up of filaments into smaller bits
  • division of a cell into two cells
  • division of a cell into many cells
  • formation of young cells from older cells.
The ability of a cell to divide into several cells during reproduction in Plasmodium is called
  • budding
  • reduction division
  • binary fission
  • multiple fission
The correct sequence of reproductive stages seen in flowering plants is
  • gametes, zygote, embryo, seedling
  • zygote, gametes, embryo, seedling
  • seedling, embryo, zygote, gametes
  • gametes, embryo, zygote, seedling
The number of chromosomes in parents and offsprings of a particular species remains constant due to
  • doubling of chromosomes after zygote formation
  • halving of chromosomes during gamete formation
  • doubling of chromosomes after gamete formation
  • halving of chromosomes after gamete formation
Factors responsible for the rapid spread of bread mould on slices of bread are
  • (i) and (iii)
  • (ii) and (iv)
  • (i) and (ii)
  • (iii) and (iv)
Length of pollen tube depends on the distance between
  • pollen grain and upper surface of stigma
  • pollen grain on upper surface of stigma and ovule
  • pollen grain in anther and upper surface of stigma
  • upper surface of stigma and lower part of style
Which of the following statements are true for flowers?
  • (i) and (iv)
  • (ii) and (iii)
  • (i) and (iii)
  • (ii) and (iv)
Which among the following statements are true for unisexual flowers?
  • (i) and (iv)
  • (ii), (iii) and (iv)
  • (iii) and (iv)
  • (i), (iii) and (iv)
Which among the following diseases is not sexually transmitted?
  • Syphillis
  • Hepatitis
  • HIV – AIDS
  • Gonorrhoea
In human males, the testes lie in the scrotum, because it helps in the
  • process of mating
  • formation of sperm
  • easy transfer of gametes
  • all the above
In following Figure, the parts A, B and C are sequentially
  • cotyledon, plumule and radicle
  • plumule, radicle and cotyledon
  • plumule, cotyledon and radicle
  • radicle, cotyledon and plumule
0 h : 0 m : 1 s

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