Embryos prom synergids, Biology

Assignment Help:

Embryos Prom Synergids

The synergids, which usually degenerate prior to or soon after double fertilization, are reported to give rise to embryos in Argentine mexicana, Tamarix erimids, Dioscorea composita. The synergid embryos grow along with the zygotic embryo in the embryo sac. In Najas major the synergid and the egg cell are fertilized and the resulting embryos resemble each other. Fertilization of the synergid is usually on account of entry of additional pollen tube in the embryo sac.

Sometimes the unfertilized synergid is also stimulated to divide and form an embryo like structure. In the normal course only the zygotic embryo attains maturity and the haploid or diploid synergid embryo degenerates.


Related Discussions:- Embryos prom synergids

Define meitrac system instrument removal system, Define Meitrac System Inst...

Define Meitrac System Instrument Removal System a) Trephining bur to remove dentine and uncover the coronal end of the file b) Extractor of appropriate size is placed over t

Available and non-available water, Available and Non-available Water Yo...

Available and Non-available Water You have seen above that water is present even in the apparently dry soils but it is of not much use as far as the plants are concerned. They

Nervous system - cranial nerves, CRANIAL NERVES 12 pairs. Total weig...

CRANIAL NERVES 12 pairs. Total weight 12 gms. Upto amphibian 10 pairs cranial nerves are present. 1, 2, 8, - sensory. 3, 4, 6, 11, 12, motor. 5, 7, 9, 10 - mixed. 3

Plants are supplied with adequate amount of phosphorus, Plants are supplied...

Plants are supplied with adequate amount of phosphorus Phosphorus has also been associated with early maturity of crops particularly the cereals. Its shortage is accompanied by

Enumerate about the colour vision defects, Enumerate about the colour visio...

Enumerate about the colour vision defects Acquired colour vision defects can occur afkr damage to the optic nerve or macula and in some cases, because of blue blindness in old

What are autotrophic beings? what are heterotrophic beings, What are autotr...

What are autotrophic beings? What are heterotrophic beings? The Autotrophic beings are those that can produce their own food that is that make organic material from inorganic c

Omnispective classification, Omnispective Classification This is the ex...

Omnispective Classification This is the extension of the concept of natural classification put forward by Black Welder (1967). The approach seems quite realistic and pragmatic.

Functions of iron in the body, functions of iron in the body: Iron i...

functions of iron in the body: Iron is the major component in haemoglobin. It helps to carryout oxygen from lungs to the tissues. About 60 to 70% of Iron in the body i

What are dna ligases, What are DNA ligases? How do these enzymes participat...

What are DNA ligases? How do these enzymes participate in the recombinant DNA technology? The DNA ligases are enzymes specialized in tying the complementary DNA chains that for

What are the antigens and antibodies of abo blood system, What are the anti...

What are the antigens and antibodies of each blood type of the ABO blood system? Type A: antigen A, antibody anti-B. Type B: antigen B, antibody anti-A. Type AB: antigens A and

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