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.
How do adhesion and cohesion help plants move materials?
Which is plant tissues specialized in covering? The dermal tissues or covering tissues of the plants are the epidermis (that covers the leaves and the young stems and shoots) a
Heart of cockroach: In cockroach, heart is situated in pericardial sinus. It has13 chambers These are one behind the other. Each chamber opens into preceeding one. The
Define the Drugs Effects on Excretion? Use of certain drugs can influence the excretion of certain substances. For example, besides their intended increase in sodium excretion,
Explain Glycerol esters of fatty acids Glycerol esters of fatty acids, which make up to 99% of the lipids of plant and animal origin have been traditionally called fats and oi
Q. Can you explain Restrictive Ventricular Septal Defect ? VSD is restrictive when VSD pressure gradient is more than 60mmHg (systolic cuff pressure-VSD lpressure grad
Water Soluble Vitamins B-vitamins are abundant in milk and other feeds. B-vitamins are synthesized by rumen microorganisms, beginning soon after a young animal begins feeding.
Q. Illustrate Omega Taxonomy? After synthesising a basic classification, the taxonomist can attempt to improve upon it. Therefore, the observed facts are interpreted in Omega t
all of their function on different system
Explain mature monocot embryo:
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