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

Lower calorific value (lcv) or net calorific value (ncv), It is defined as ...

It is defined as the amount of heat liberated when one unit mass of fuel is burnt and the products of combustion are allowed to escape.                                  LCV = HC

Acute phase reactants, ESR and CRP are elevated in almost all patients of a...

ESR and CRP are elevated in almost all patients of arthritis and carditis and rarely in patients with chorea. ESR should be repeated periodically as it is useful in following the c

Coronal disassembly, Coronal disassembly - Coronal restoration in the ...

Coronal disassembly - Coronal restoration in the retreatment phase called coronal deassembling or disassemblying. - Coronal deassembling means removal of coronal and radi

What would be the probability of obtaining result, A plant grown from one o...

A plant grown from one of Mendel's yellow peas is selfed. Five progeny peas are obtained from this self and they are all yellow. If the original selfed plant had been homozygous, w

What is the typical vegetation of the grasslands, What is the typical veget...

What is the typical vegetation of the grasslands? Grasslands are mostly formed of herbaceous (nonwoody) vegetation: grass, bushes and small trees. Biomes - Image Diversity:

Emulsion products, E m u l s io n products Ground meat products s...

E m u l s io n products Ground meat products such as sausages, patties and luncheon meats are emulsion based products and their quality depends upon the ability of lean m

Define nitrogen estimation - kjeldahl''s method, Define Nitrogen Estimation...

Define Nitrogen Estimation - Kjeldahl's Method? Nitrogen in the protein is estimated by a method referred to as Kjeldahl's method. Although over a period of time many other met

How pregnancy and lactation affects the bmr, How Pregnancy and Lactation af...

How Pregnancy and Lactation affects the bmr? These periods of physiological stress also has an impact on the metabolic rate. Earlier, we studied that REE is highest during the

Evolution and growth of sports nutrition as a discipline, Define Evolution ...

Define Evolution and Growth of Sports Nutrition as a Discipline? An academic discipline is basically a formal body of knowledge discovered, developed, and disseminated through

Explain cidofovir, Cidofovir (Vistide) IV cidofovir given once weekly ...

Cidofovir (Vistide) IV cidofovir given once weekly for 2 weeks and then once every 2 weeks for maintenance therapy can delay progression of CMV retinitis in patients with AIDS

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