Pollination, Biology

Assignment Help:

Pollination

Pollination refers to the transfer of pollen from dehiscing anthers to the pistil. Unlike animals, plants cannot move to their mates for sexual reproduction. Hence, they need some external device or agency for the transfer of pollen grains from the male parent to the stigma of the female parent. Exceptionally, in Vallisneria, an aquatic plant, complete male flower may be transported to the female flowers, the physical (wind and water) and biological (insects, birds and bats) agencies promote cross-pollination. The dehiscence of anthers and the transfer of pollen are the prime requirements of pollination.


Related Discussions:- Pollination

Collenchyma, Collenchyma are one of the three major cell types in the plan...

Collenchyma are one of the three major cell types in the plants; are elongated and have thicker walls than parenchyma cells and are usually arranged in strands; gives support and

Explain about human sperm, Which one of the following statements about huma...

Which one of the following statements about human sperm is correct? 1. Acrosome has a conical pointed structure used for piercing and penetrating the egg, resulting in fertilis

Reproduction in human beings, Are sperms being attacked by the body since t...

Are sperms being attacked by the body since they are foreign?

What is oxygen-haemoglobin dissociation curve, What is oxygen-haemoglobin d...

What is oxygen-haemoglobin dissociation curve? Explain the role of red blood cells in the transport of oxygen and carbon dioxide by blood. Briefly describe the principle, pr

What is the endosymbiotic hypothesis, Q. What is the endosymbiotic hypothes...

Q. What is the endosymbiotic hypothesis about the origin of mitochondria? And what are the molecular facts that support the hypothesis? And To which other cellular organelles can t

Illustrate the structure of the central nervous system, Q. What is the stru...

Q. What is the structure of the central nervous system that regulates pulmonary respiration? The reaction is catalyzed by the enzyme carbonic anhydrase present in red blood cel

Dietary management of constipation, Q. Dietary Management of Constipation? ...

Q. Dietary Management of Constipation? Management of constipation lies in developing regularity of habit through a bowel- training programme and by establishing good healthy ha

How is price mechanism or supply and demand concerned, How is price mechani...

How is price mechanism or supply and demand concerned?   The price mechanism or supply and demand: The price mechanism or supply and demand is concerned with how buyers

Meiosis comprises two separate divisions, All of the following make meiosis...

All of the following make meiosis different from mitosis; EXCEPT A. Meiosis comprises two separate divisions. B. Meiosis only occurs during embryonic development. C. Chromoso

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd