Development of pollen in cyperaceae, Biology

Assignment Help:

Development of Pollen in Cyperaceae

In all members of the Cyperaceae out of the four nuclei formed after meiosis, only one functions, the others degenerate. The functional nucleus remains in the centre and the three non-functional nuclei are pushed to a side. In Cyphers, Kyllinga, and Scirpus the non-functional nuclei are separated from the functional nucleus by a wall. Walls are also laid between the nonfunctional nuclei. The functional nucleus divides to form a vegetative cell and a generative cell.

1231_Development of Pollen in Cyperaceae.png

Development of Pollen in Cyperaceae

The non-functional nuclei may also begin to divide but the divisions are abortive, and they eventually degenerate. Thus in a tetrad, only one pollen grain is functional. This feature is similar to the behavior of megaspores in the development of monosporic embryo sac.


Related Discussions:- Development of pollen in cyperaceae

What are the stages of soil, What are the Stages of soil The developmen...

What are the Stages of soil The development of soil takes place in two stages. In the first stage there is formation of parent material which is generally consolidated and cons

First type of rheological model, Q. First type of rheological model? Th...

Q. First type of rheological model? This method establishes relation between the pressure gradient and the volume rate of flow. Here, the piston measurement is used to measure

Nutrition education for prevention of vitamin a deficiency, Define Nutritio...

Define Nutrition Education for prevention of vitamin a deficiency? Ignorance, you may recall studying earlier, is an important determinant of vitamin A deficiency. There is, th

Define human beings need energy for basal metabolism, Define human beings n...

Define human beings need energy For Basal metabolism? This comprises a series of functions that are essential for life, such as cell function and replacement; the synthesis, se

Determine the enzymes utilization in baking industry, Enzymes utilization i...

Enzymes utilization in Baking Industry In the baking of bread, the preliminary process involves the mixing of wheat flour (mainly starch and proteins) with yeast and water. Sta

What are the three major types of rna, Q. What are the three major types of...

Q. What are the three major types of RNA? What is meant by heterogeneous RNA? Messenger RNA, or mRNA, transfer RNA, or tRNA, and ribosomal RNA, or rRNA, are the three main type

Pregnancy, What are the physiological changes during pregnancy

What are the physiological changes during pregnancy

What are the blood types of the abo blood system, What are the blood types ...

What are the blood types of the ABO blood system? The type A, the type B, the type AB and the type O are the blood types of the ABO blood system..

Classification of living things, Ask question what is classification of liv...

Ask question what is classification of livibg thingsMinimum 100 words accepted#

Ganong''s potometer, What happens to the movement of the air bubble if the ...

What happens to the movement of the air bubble if the apparatus is kept in i. In the dark ii. In sunlight iii.In front of a fan

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