Xenogamy is essentially a type of from Biology Sexual Reproducti

Previous Year Papers

Download Solved Question Papers Free for Offline Practice and view Solutions Online.

Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Test Yourself

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.
Advertisement

 Multiple Choice QuestionsMultiple Choice Questions

161.

Exine of pollen grain is made up o

  • pectocellulose

  • lignocellulose

  • sporopollenin

  • pollen kit


162.

Seedless banana is

  • parthenocarpic fruit

  • multiple fruit

  • drupe fruit

  • true fruit


163.

Ovule integument gets transformed into

  • seed

  • fruit wall

  • seed coat

  • cotyledons


164.

Sporopollenin is chemically

  • homopolysaccharide

  • fatty substance

  • protein

  • heteropolysaccharide


Advertisement
165.

During replication of DNA, Okazaki fragments are formed in the direction of

  • 3' ➔ 5'

  • 5' ➔ 3'

  • 5'➔5'

  • 3' ➔ 3'


166.

If you want to develop hybrid seeds within a bisexual flower, the following part needs to be removed from the same flower

  • stigma

  • ovary

  • anther

  • oviduct


Advertisement

167.

Xenogamy is essentially a type of

  • cleistogamy

  • allogamy

  • autogamy

  • homogamy


B.

allogamy

Xenogamy is true cross-pollination, i.e., allogamy which involves the transfer of pollen grains from the anther of one plant to the stigma of another, genetically dissimilar plant.

Cleistogamy is a type of automatic self-pollination of certain plants that can propagate by using non-opening, self-pollinating flowers. 

Autogamy or self-fertilization, is the fusion of two gametes that come from one individual. It is predominantly observed in the form of self-pollination, a reproductive mechanism employed by many flowering plants.

Homogamy is a state in which the flowers of a plant are all of one type either hermaphrodite or of the same sex.


Advertisement
168.

Megasporangium is equivalent to

  • embryo sac

  • fruit

  • nucellus

  • ovule


Advertisement
169.

Seed coat is not thin, membranous in

  • maize

  • coconut

  • groundnut

  • gram


170.

Which one of the following statement is correct?

  • Hard outer layer of pollen is called intine

  • Sporogenous tissue is haploid

  • Endothecium produces the microspores

  • Tapetum nourishes the developing pollen


Advertisement