Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Secondary Egg Envelopes
These are secreted by oviducts and other accessory parts of genital organs while the egg is passing through them from ovary to the exterior.
a) In ovoviviparous sharks the egg is surrounded by a hard shell secreted by shell glands of the oviduct. The shell is drawn out as twisted horns which serve to entangle the egg among sea weeds.
b) In amphibians, the eggs are surrounded by a layer of jelly which protects the egg from adverse effects of sun rays, abrasion as well as from predators (because of its bad taste). The jelly absorbs water and swells.
c) In birds, reptiles and monotremes, the secondary envelopes include the white of egg surrounding the yolky ovum, followed by inner and outer shell membranes (which are in close contact with one another) and the outermost calcareous shell which is 'porous. The shell is elastic and compressible when the egg is laid but it hardens on exposure to atmosphere.
Modified or Semi-synthetic Gums These are natural polymers, which are chemically modified to give a new product with improved functional properties. These also fall into severa
Define Mineral Requirements during pregnancy period - Iron? While B 12 and folk acid are needed for the normal erythropoiesis, they must be accompanied by adequate amounts of
What is the function of the left ventricle? Where does the blood go after leaving the left ventricle? The function of the left ventricle is to get blood from the left atrium an
Dominance - Synthetic Characters It is a characteristic of vegetation which expresses the predominating influences of one or more species in a stand so that the population of
Bacteria have a region known as a nucleoid, in which their genetic material is located. Why, then, are bacteria classify as prokaryotes? The nucleoid is not surrounded by a mem
what is impotence?
write the names of these animals? 1.amoeba 2.sponge 3.hydra 4.liverfluck 5.Iscariot 6.leech 7.insects 8.oyster 9.starfish 10.frog
What is the valve that separates the aorta from the heart? What is the importance of that valve? The valve among the left ventricle and the aorta is the aortic valve. The aorti
Introduction: There are different technologies available for dealing with waste water management and excreta. Some are suitable for dealing off-site sanitation and other can b
PANCREA S - It is derived from the endoderm of the embryo. Structure . The pancreas lies inferior to the stomach in a bend of the duodenum. It is both an exocrine an
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!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd