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

Monounsaturated fatty acids required for dyslipidemia, Q. Monounsaturated f...

Q. Monounsaturated fatty acids required for dyslipidemia? Polyunsaturated fatty acids also have a cholesterol decreasing effect. Omega 3 fatty acids are excellent for the heart

What is the constitution of the cartilaginous matrix, What is the constitut...

What is the constitution of the cartilaginous matrix? The cartilaginous matrix is made of collagen fibers, mostly collagen type II, and of proteoglycans, proteins associated to

The genotype of a plant showing the dominant phenotype, The genotype of a p...

The genotype of a plant showing the dominant phenotype can be determined by : 1. Test cross 2. Dihybrid cross   3. Pedigree analysis 4. Back cross It is determined

What is etiopathology, Q. What is Etiopathology? Who is likely to devel...

Q. What is Etiopathology? Who is likely to develop gout? What are the risk factors? Let us find out. Gout is caused when there is over production of uric acid in normal purine

Define protein stabilized food emulsions, Define Protein Stabilized Food Em...

Define Protein Stabilized Food Emulsions? Many food products are emulsions (eg. milk cream, ice creams, cream, butter etc.) and protein constituents often play a major role in

Define energy and protein requirement in geriatric nutrition, Define Energy...

Define Energy and Protein requirements in geriatric nutrition? Decreased physical activity and changes in body composition and decreased basal metabolic rate affects the ma

Sericulture industry, in sericulture industry do which stages of silkworm w...

in sericulture industry do which stages of silkworm weaver buy? why do they do so?

Role of dietitian in health care, Role of Dietitian in Health Care The ...

Role of Dietitian in Health Care The role of the dietitian has come a long way since the early 1900s. Their role is still unknown to a  lot of people. Some think that dietitian

Define triglycerides and atherogenesis, Triglyceride accumulation is not a ...

Triglyceride accumulation is not a feature of the atherosclerotic plaque but triglyceride-rich lipoproteins also contain cholesterol esters and it is likely that some of these are

Explain about periimplant probing depth, Periimplant Probing Depth In c...

Periimplant Probing Depth In contrast to natural teeth, for which the average periodontal probing depth (PD) has been reported, the physiologic depth of the periimplant sulcus

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