Special Mode Of Reproduction Test

Special Mode Of Reproduction

This is online test 02 for CBSE class 12 Biology Sexual Reproduction in Flowering Plants (Special mode of reproduction).. There are 10 questions in this test with each question having around four answer choices.

Questions & Answers

1
The fusion of two polar nuclei with one male gamete is called
  • A
    Cellular division
  • B
    Triple fusion
    Correct
  • C
    Syngamy
  • D
    Double fertilisation
2
Filiform apparatus present in egg synergids of female gametophyte pay important role of
  • A
    Endosperm formation
  • B
    Guiding pollen tube into synergids.
    Correct
  • C
    Double fertilisation
  • D
    Syngamy
3
The coconut water from tender coconut is nothing but
  • A
    Embryo sac
  • B
    Free nuclear endosperm
    Correct
  • C
    Nucellus
  • D
    Cellular endosperm
4
Main function of pollen tube is to
  • A
    Reception of pollen grains
  • B
    Formation of male gametes
  • C
    Transfer pollen grains embryo sac for fertilisation.
    Correct
  • D
    Transfer of male hormone to ovary
5
A typical angiospemic embryo sac is though 8 nucleate is 7-celled. 8 nuclei includes
  • A
    2 egg apparatus, 3 polar nuclei and 3 antipodal
  • B
    2 egg apparatus, 3 polar nuclei and 3 antipodal
  • C
    3 egg apparatus, 3 polar nuclei and 2 antipodal
  • D
    3 egg apparatus, 2 polar nuclei and 3 antipodal
    Correct
6
The major approach towards the crop improvement programme is
  • A
    Emasculation
  • B
    Artificial hybridization
    Correct
  • C
    Bagging
  • D
    Double fertilisation
7
Primary endosperm cell (PEC) is triploid (3n) structure as it is formed by
  • A
    Fusion of two egg synergids and one polar nuclei
  • B
    Fusion of two polar nuclei and one male gamete.
    Correct
  • C
    Fusion of two egg synergids and one male gamete
  • D
    Fusion of one polar nuclei and two male gametes
8
The correct order of stages of embryogeny in dicotyledonous embryo is
  • A
    Zygote>proembryo> heart-shaped embryo> globular embryo>mature embryo
  • B
    Zygote> globular embryo>proembryo>heart-shaped embryo>mature embryo
  • C
    Zygote>proembryo>globular embryo>heart-shaped embryo>mature embryo
    Correct
  • D
    Zygote> globular embryo>heart-shaped embryo>proembryo>mature embryo
9
Assertion: The portion of embryonal axis above the level of cotyledon is epicotyl. Reason: Epicotyl terminates at with lower end in the radicle or root tips.
  • A
    Both assertion and reason are incorrect
  • B
    Assertion is correct but reason is incorrect
    Correct
  • C
    Assertion is incorrect but reason is correct
  • D
    Both assertion and reason are correct
10
Statement I: Embryos of monocotyledons possesses only one cotyledon. Statement II: In grass family cotyledon is called as scutellum. Statement III: In monocotyledonous embryo radicle and root cap is covered by coleoptile.
  • A
    Statement I and II are correct only.
    Correct
  • B
    All statements are correct.
  • C
    Statement II and III are correct only.
  • D
    Statement I and III are correct only.