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

Prevention and community action - psychoactive substance, Prevention and Co...

Prevention and Community Action: A number of  preventive action are necessary. Alcohol prevention programmes can have major effects on alcohol problem rates, and can influence

How dietary constituents affecting the calcium absorption, How dietary cons...

How dietary constituents affecting the calcium absorption? Several dietary constituents have an effect on calcium absorption. The differences in fractional absorption from diff

Write an account on coenzymes, Question 1 Describe in detail the immunopro...

Question 1 Describe in detail the immunoprophylaxis Question 2 Give a detailed account on autoimmune diseases Question 3 Describe the classification and properties of an

Developmental biology, a recent topic for my developmental biology assignm...

a recent topic for my developmental biology assignment

Chromosome jumping, Chromosome jumping is the technique whereby one begins...

Chromosome jumping is the technique whereby one begins with a piece of DNA from one area of a chromosome, and obtains clones from nearby areas without cloning everything in betwee

Define the process of digestion of proteins, Define the Process of Digestio...

Define the Process of Digestion of Proteins? The daily protein intake (of about 50-100 g) and the protein of enzymes, sloughed (bled or drop off) epithelial cells and mucins, w

Illustrate the types of Bone Remodeling, Illustrate the types of Bone Remod...

Illustrate the types of Bone Remodeling Bone remodeling occurs on existing bone surfaces. However, unlike modeling, remodeling cannot cause large changes in bone structure at a

Fructose doesnt have aldehyde group reacts with fehling sol, Although fruct...

Although fructose does not have an aldehyde group it reacts first of all  bonds of fructose was breaked by fehling solution then fructose coverted to aldehydic group then that

When does the greatest buffering capacity of weak acids, The greatest buffe...

The greatest buffering capacity of weak acids is when- Select one: a. They are almost completely dissociated b. They are almost completely undissociated c. They are nea

What is the indolacetic acid (iaa), What is the indolacetic acid (IAA)? ...

What is the indolacetic acid (IAA)? IAA or Indolacetic acid (indolyl-3-acetic acid) is the major natural auxin made by plants. It promotes plant growth and cellular differentia

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