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

Use of gloves as personal protective equipment, Q. Use of Gloves as persona...

Q. Use of Gloves as personal protective equipment? Gloves are task specific. The different types of gloves worn in the dental office are: i) Examination gloves ii) Over o

Obelia, whyis it considered to showintermideate grade oforganisation

whyis it considered to showintermideate grade oforganisation

What is the association between inflammation and fever, What is the associa...

What is the association between inflammation and fever? In the tissue region where inflammation happens bacterial toxins, cytokines, prostaglandins, interleukins and endothelin

Tropical seasonal forests - ecosystem, Tropical seasonal forests - Ecosyste...

Tropical seasonal forests - Ecosystem Tropical seasonal forests occur in regions where total annual rainfall is very high but segregated into pronounced wet and dry periods. T

Explain database search, Database Search: Once an open reading frame or th...

Database Search: Once an open reading frame or the partial amino acid sequence has been pre-determined, the investigator compares sequence with others in the databases using a com

What is carbohydrates, What is Carbohydrates? Carbohydrates : Carbohyd...

What is Carbohydrates? Carbohydrates : Carbohydrates function mainly as immediate sources of energy, stored energy such as starch, and structural components of cells. Carbohyd

Zoogly, are protozoans primitive to life .

are protozoans primitive to life .

Foods implicated in botulism, The types of foods involved in botulism vary ...

The types of foods involved in botulism vary according to food preservation and eating habits in different regions. Any food that is conducive to outgrowth and toxin production, th

Functions of the pancreas, The pancreas performs digestive and hormonal fun...

The pancreas performs digestive and hormonal functions. The enzymes secreted by the exocrine tissue in the pancreas help in the break down of carbohydrates, fats, proteins, and

What are yeast, Q. What are yeast? Yeasts are unicellular fungi, which ...

Q. What are yeast? Yeasts are unicellular fungi, which are widely distributed in nature. They are somewhat larger than bacteria. The cell length is about 10μm and the diameter

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