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 hemoglobin, What is hemoglobin? What is the inorganic element that ...

What is hemoglobin? What is the inorganic element that is fundamental in the composition of hemoglobin? Hemoglobin is the protein present in the blood responsible for the trans

Cholesterol, Cholesterol Cholesterol is found in several of the animal ...

Cholesterol Cholesterol is found in several of the animal foods we eat, involving cheese, eggs, and red meat. Just animal cells utilize and synthesize cholesterol. Click the bu

Describe the maturity stages in fish, Question 1: (a) Describe the mat...

Question 1: (a) Describe the maturity stages in fish. (b) "k" and "r" selection strategies are commonly used to describe the response of fish to biotic and abiotic cond

What does fungus looks like, Q. What does this fungus looks like? Ans...

Q. What does this fungus looks like? Ans. The important characteristic features of aflatoxicosis are jaundice, cirrhosis. Long term exposure to aflatoxins could lead to

Most abundant form under which nitrogen is found in nature, Q. What is the ...

Q. What is the most abundant form under which nitrogen is found in nature? The major abundant nitrogen-containing molecule found in nature is molecular nitrogen (N2). The air i

When should eat a salad with lettuce, When you eat a salad with lettuce, cr...

When you eat a salad with lettuce, croutons, hard-boiled egg, bacon bits, and salad dressing, which one of those ingredients will be broken down the least by your digestive system?

What treatment should be used for constrictive pericarditis, Q. What treatm...

Q. What treatment should be used for constrictive pericarditis? Medical Treatment 1) Judicious use of diuretics to alleviate systemic congestion. This may be enough in s

Bergmann's method of cell plating, Bergmann's Method of Cell Plating I...

Bergmann's Method of Cell Plating In this method free cells are suspended in a liquid medium at a density twice the finally desired plating density. Melted agar containing med

Can obesity causes the cardiovascular disease, Q. Can Obesity causes the ca...

Q. Can Obesity causes the cardiovascular disease? As you know obesity or excessive weight is the primary cause of cardiovascular disease. It is an independent risk factor for h

Spoilage of soft drinks, Q. Explain Spoilage of Soft Drinks? We all co...

Q. Explain Spoilage of Soft Drinks? We all consume soft drinks, fruit juices, as well as, preserves, which normally are available in the market as tetrapacks, cans, bottles

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