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

What is the diffusion, Q What is the diffusion? Diffusion is the spread...

Q What is the diffusion? Diffusion is the spreading of substance molecules from a region where the substance is further more concentrated to another region where it is less con

Respiratory system in fishes, The fishes belong to class Pisces under verte...

The fishes belong to class Pisces under vertebrates. 2. In fishes, the respiratory system consists of mouth, pharynx, internal branchial apertures, branchial pouches and external b

The non-oxidative phase generates ribose precursors, The non-oxidative ph...

The non-oxidative phase  generates  ribose precursors The non-oxidative phase of  the pathway,  including the following reactions, converts pentose-5-phosphate to other sugars.

Excreation, what is the role of liver for the metabolism of carbohydrates

what is the role of liver for the metabolism of carbohydrates

Where are the adrenal glands located, Where are the adrenal glands located?...

Where are the adrenal glands located? How many are they and what are their portions? Each adrenal gland is located on the top of every kidney (forming a hat-like structure for

Plant physiology, detail notes on seed dormancy and seed germination

detail notes on seed dormancy and seed germination

Microorganisms, discuss the importance of protozoa to humans

discuss the importance of protozoa to humans

Include the uncertainty interval and confidence level, What is the minimum ...

What is the minimum sample weight, at USP standards (U = 0.1% and k = 3), that can be measured on an analytic balance in which the repeatability is 0.0001 g. Include the uncertaint

What is gene, What is gene? Gene is a sequence of DNA nucleotides that ...

What is gene? Gene is a sequence of DNA nucleotides that codifies the production of a protein.

Causes of diabetic ketoacidosis, Q. Causes of Diabetic Ketoacidosis? Th...

Q. Causes of Diabetic Ketoacidosis? The causes of Diabetic Ketoacidosis (DKA) are the following: - Missing of insulin injection - Infection - Trauma (injury) - Myoc

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