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

Applications of oracle clinical in pharmaceutical industries, Question 1: ...

Question 1: Write the applications of Oracle clinical in Pharmaceutical industries Explain what is "Oracle clinical" Explain different application of oracle clinical

Equipment of circulatory assist devices, Equipment :  Basically, it has an...

Equipment :  Basically, it has an intra aortic balloon pump. A balloon with a capacity of 40 ml is passed percutaneously through the femoral artery up to the upper end of descen

Explain about the carbohydrate malabsorption, Explain about the Carbohydrat...

Explain about the Carbohydrate Malabsorption? Carbohydrates malabsorption is usually caused by an inherited or acquired (in intestinal infection, celiac disease, PEM) defect in

Name element playing significant role in nitrogen fixation, An element play...

An element playing significant role in nitrogen fixation is : 1.  Molybdenum 2. Copper 3. Manganese 4. Zinc An element playing significant role in nitrogen fixation

How the pressure change inside the ear, Q. Why is there a sense of pressure...

Q. Why is there a sense of pressure change inside the ear when someone goes down a mountain? The pressure inside the middle ear is maintained equal to the external ear so to th

How is the respiratory system of insects, Q. How is the respiratory system ...

Q. How is the respiratory system of insects with its independence between respiration and circulation related to the motor agility of some species of this arthropod class? Even

Chuck darwin knew blending theory, Chuck Darwin knew BLENDING THEORY, but h...

Chuck Darwin knew BLENDING THEORY, but he also knew that if it was true his NOT work because

Digestion of proteins, Digestion  of proteins Digestion  of proteins  ...

Digestion  of proteins Digestion  of proteins  is  initiated  in  the  stomach by pepsin.  Pepsin  acts upon food proteins  and  converts them  to proteoses  and  peptones whic

Observation or inference for half and full saturation test, Define Observat...

Define Observation or Inference for half and full saturation Test? 1. Starch is precipitated by half saturation with ammonium sulfate whereas dextrin is not precipitated. This

Control of excretion, CONTRO L OF EXCRETION - 1.      In brain hypoth...

CONTRO L OF EXCRETION - 1.      In brain hypothalamus is osmocentre that controls minerals. 2.      Cells of DCT & arterioles combien to form Juxta glomerular node, it se

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