Nucellus - ovule, Biology

Assignment Help:

Nucellus - Ovule

Enclosed within the integuments lies a homogenous mass of tissue which is termed as the nucellus. This is the tissue in which the female gametophyte differentiates and develops. At an early stage of ovule development, usually an archesporial cell or a group of cells differentiate in the hypodermal region of the nucellus. The archesporial cell may function directly as the sporogenous cell. In such situations, the sporogenous cell also remains hypodermal in position and is surrounded by a single-layer of nucellus, in the micropylar region. Such ovules are known as tenuinucellate. These are commonly seen in Sympetalae.

405_Nucellus.png

Figure: Tenuinucellate ovule of Elytraria acaulis. In c and d integuments are not shown.


Related Discussions:- Nucellus - ovule

Vertebrates & invertebrates, Evolution of vertebrates and invertebrates ner...

Evolution of vertebrates and invertebrates nervous system

Comparison to healthy lungs, The nature of the sounds produced by percussio...

The nature of the sounds produced by percussion (tapping) a patient's chest can tell a physician a great deal about the condition of the organs within the thoracic cavity. Healthy,

Open pulmonary valvotonzy, Open Pulmonary Valvotonzy, I nfundibular Rese...

Open Pulmonary Valvotonzy, I nfundibular Resection and Trans Annular Patch :  The pulmonary annulus may be narrow based on pre-operative investigations and on measurement

What thiamine defiency will result in decreased activity, A thiamine defien...

A thiamine defiency will result in decreased activity of: -G-6 phosphase -transketolase -fructokinase

What is meningitis, Q. What is meningitis? The Meningitis is the generi...

Q. What is meningitis? The Meningitis is the generic name given to inflammation of the meninges and membranes that cover the central nervous system. The Meningitis can have sev

Interdependance, Give an example of how two organisms are interdependent.

Give an example of how two organisms are interdependent.

Agro industrial-oil seed meals as by-pass protein source, Oil Seed Meals as...

Oil Seed Meals as By-pass Protein Source The protein digestion in ruminants encompasses microbial transformation of dietary protein in the rumin. A varying portion of feed pro

Artificial insemination, ARTIFICIAL INSEMINATION - Artificial insemi...

ARTIFICIAL INSEMINATION - Artificial insemination is a technique to make a female pregnant by artificially introducing semen into the vagina. Artificial insemination has

Feline calcivirus infection, Feline calcivirus infection This disease i...

Feline calcivirus infection This disease is caused by a virus under the family Caliciviridae. Its symptoms  include rhinitis, tracheitis and pneumonia. The animals are lethargi

Explain measurement of cell mass - microbial estimation, Explain Measuremen...

Explain Measurement of Cell Mass - Microbial Estimation? You may recall reading earlier that filamentous bacteria and moulds cannot be counted satisfactorily by employing plate

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