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

How many carbon dioxide molecules liberated in krebs cycle, Q. How many car...

Q. How many carbon dioxide (CO 2 ) molecules are liberated after each cycle of the Krebs cycle? For a single glucose how many carbon dioxide molecules were already liberated by the

Blood from a donor is sterile and stored in a sealed bag, Blood from a dono...

Blood from a donor is sterile and stored in a sealed bag, but it is still kept at 4°C. What is the advantage of keeping it at this low temperature?   At 4 °C, enzyme activi

Results-ross operation--surgical techniques, Results: The risk of isolate...

Results: The risk of isolated aortic valve replacement is 3-4 per cent. The long term survival for 5, 10 and 15years is 75 per cent, 60 per cent and 40 per cent respectively. The

Determine the part of an actuating signal, Which of the following serves as...

Which of the following serves as an actuating signal, or as part of an actuating signal, in a negative feedback system? A. Action potentials in diaphragm skeletal muscle fibers

Kinds of ovules, Kinds of Ovules Ovules undergo varied degrees of cur...

Kinds of Ovules Ovules undergo varied degrees of curvature during development. The position of micropyle with respect to the funiculus becomes different and constitutes the b

Hypothesis be used to predict the outcome of future test, A hypothesis can ...

A hypothesis can be used to predict the outcome of future testing. Which type of hypothesis is easier to test? A. It is easier to specify and test for a difference between two outc

Bohr effect, Bohr Effect Another important influence is the pH. Increa...

Bohr Effect Another important influence is the pH. Increase in carbon dioxide or other acids lowers the pH of plasma and shifts the dissociation curve to the right. At high ca

Briefly explain endocrine system, Q What is the constitution of the endocri...

Q What is the constitution of the endocrine system? The endocrine system is constituted by the hormones and the endocrine glands they secrete. Q. What is the histological n

Explain coronary heart disease, Apart from any inherited tendency towards c...

Apart from any inherited tendency towards coronary heart disease, what are thought to be the four major risk factors?  The four major risk factors for coronary heart disease ar

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