Tag: reproduction - the generating system

Questions Related to reproduction - the generating system

Match the columns with correct combination of endosperm chromosomes.

Column I Column II
(a) Pisum sativum (i) $72$
(b) Oryza sativa (ii) $24$
(c) Nicotiaba tabacum (iii) $60$
(d) Allium cepa (iv) $36$
$21$
  1. a-iv, b-i, c-ii, d-v

  2. a-i, b-ii, c-v, d-iv

  3. a-ii, b-v, c-iii, d-i

  4. a-v, b-iv, c-i, d-ii


Correct Option: D

Which of the following statements is not correct?

  1. Some reptiles have also been reported as pollinators in some plant species

  2. Pollen grains of many species can germinate on the stigma of a flower but only one pollen tube of the same species grows into the style

  3. Insects that consume pollen or nectar without brining about pollination are called pollen/ nectar robbers

  4. Pollen germination and pollen tube growth are regulated by chemical components of pollen interacting with those of pistil


Correct Option: B

Which is not properly matched?

  1. Exine of pollen grain - Sporopollenin

  2. Tapetum - Ubisch bodies

  3. Male gametophyte pf angiosperms - No prothalial cells

  4. Most common type of ovule - Orthotropous


Correct Option: D