Endothelium - ovule, Biology

Assignment Help:

Endothelium - Ovule

In plants bearing unitegmic ovules, the nucellus degenerates during early stages of ovule development and the embryo sac comes in contact with the innermost layer of the integument. The cells of this layer become specialised to supply nutrients to the embryo sac. These cells elongate radially, their cytoplasm becomes dense and store starch and lipids. This specialised layer is called endothelium. Endothelium is also reported in some bitegmic ovules. Tapetal cells are similar to endothelium cells of anther in storing carbohydrates, proteins, RNA, ascorbic acid and other metabolites; it is secretory in function is hence referred to as the integumentary tapetum.


Related Discussions:- Endothelium - ovule

Show major signs of diabetes, Q. What are the three major signs of diabetes...

Q. What are the three major signs of diabetes? The three major signs of diabetes mellitus are known as the diabetic triad- polydipsia, polyuria and polyphagia. Polyuria is t

Homoeostasis, what stimulate the system in homoeostasis

what stimulate the system in homoeostasis

Why are lysosomes known as the cleaners of the cell waste, Q. Why are lysos...

Q. Why are lysosomes known as "the cleaners" of the cell waste? Lysosomes carry out heterophagic and autophagic digestion autophagic digestion by digesting residual substances

Which are mineral salts, Q. Which are mineral salts? Where in living beings...

Q. Which are mineral salts? Where in living beings can found mineral salts? Mineral salts are simple inorganic substances made of metallic chemical elements, like sodium, iron,

What are the glucagon receptors in the plasma membranes, Which of the follo...

Which of the following serves as an effector, or as part of an effector, that functions in a negative feedback system? A. Glucagon Receptors in the plasma membranes of alpha-is

Which of substance are microtubules, Q Which Of substance are microtubules ...

Q Which Of substance are microtubules made and In which structures and cellular processes do microtubules participate? Microtubules are made of consecutive dimers of the protei

Closed heart surgery, Closed Heart Surgery Blind operations and access...

Closed Heart Surgery Blind operations and access is obtained into the heart through incision on the ventricular or atrial wall. Commonest closed heart surgery done is m

What are those phyla, Q Beings from four phyla of the animal kingdom "breat...

Q Beings from four phyla of the animal kingdom "breath" (do gas exchange) by diffusion. Which are those phyla? How is this type of respiration associated to features present in tho

Morphogenesis and totipotency, Morphogenesis and Totipotency A chlamy...

Morphogenesis and Totipotency A chlamydomonas mother cell gives rise to two daughter cells by a simple division. But a leaf cell cannot give rise to a new plant except in cas

Explain adverse effects of stavudine, Explain Adverse effects of Stavudine ...

Explain Adverse effects of Stavudine Fatal lactic acidosis may happen more frequently with stavudine than with other NRTIs. Serum aminotransferase activity may enhance with sta

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