Pollination Test

Pollination

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

Questions & Answers

1
Tapetum in pollen grains help in
  • A
    Help in pollen grain germination
  • B
    Provide protection to microspore mother cell
  • C
    Provide nourishment to young microspore mother cell
    Correct
  • D
    Help in dispersal of pollen grain
2
Self-pollination generation after generation results in pure line formation due to
  • A
    Plants became heterozygous
  • B
    Ultra violet rays
  • C
    Plants became homozygous
    Correct
  • D
    Mutation
3
The flower which does not open for pollination are called as
  • A
    Cleistogamous
    Correct
  • B
    Geitogamous
  • C
    Autogamous
  • D
    Chasmogomous
4
Abundant occurrence of fossilized pollen grain is due to resistant
  • A
    Lignocellulose
  • B
    Pectolignin
  • C
    Sporopollenin
    Correct
  • D
    Pectocellulose
5
Continued self-pollination results in inbreeding depression as they
  • A
    Produce pure line
    Correct
  • B
    New genes are accumulated
  • C
    Mutation is established
  • D
    Help in evolution
6
In nature, inbreeding and out breeding of plants is regulated by
  • A
    Duration of pollen and ovule formation
  • B
    Parthenogenesis
  • C
    Intraspecific and interspecific incompatibility
    Correct
  • D
    Maturation and hybridization
7
A bilobed dithecous anther had 50 microspore mother cells per microsporangium. How many male gametes this anther can produce
  • A
    200
  • B
    800
    Correct
  • C
    100
  • D
    400
8
Pollen grain of large number of species can be stored in
  • A
    Liquid sulphur dioxide
  • B
    Liquid carbon dioxide
  • C
    Liquid oxygen
  • D
    Liquid nitrogen
    Correct
9
Which one is the current sequence in the formation of microspore?
  • A
    Sporogenous tissue, Microsporangium, microspore tetrad, microspore
  • B
    Microsporangium , Sporogenous tissue, microspore tetrad, microspore
    Correct
  • C
    Microspore tetrad , Microsporangium , Sporogenous tissue, microspore
  • D
    Sporogenous tissue, microspore tetrad, Microsporangium, microspore
10
Assertion: Pollination by wind is most common among the abiotic pollinations. Reason: Wind pollination requires light and non-sticky pollen grains to be transported by winds.
  • A
    Both assertion and reason are incorrect.
  • B
    Assertion is incorrect but reason is correct
  • C
    Assertion is correct but reason is incorrect.
  • D
    Both assertion and reason are correct.
    Correct