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!
Primary Egg Envelopes
These are the egg envelopes which develop in the ovary between oocyte and follicle cells in the space occupied by the interdigitating microvilli. Such envelopes have been named variously in different animals.
a) It is named as vitelline envelope or vitelline membrane in insects, molluscs, amphibians and birds.
b) In tunicates and fishes, it is known as chorion. In many sharks and bony fishes the primary envelope has striated appearance and is referred to as zona radiata representing the degraded microvilli of the growing oocyte. The perforation in the zona radiata becomes the micropyle through which the spermatozoa can enter the egg.
c) In mammals, the unstriated and modified zona pellucida is formed as a result of joint efforts of egg and follicle cells. While escaping the Graafian follicle mammalian oocyte carries on the surface of zona pellucida a layer of follicle cells known as corona radiata. The primary envelopes usually stick closely to the egg surface. These later on participate in the formation of fertilization membrane.
Explain soybean protein The need for the development of soybean protein concentrates stemmed primarily from two considerations: to enhance protein concentration and to improve
Stratification On the basis of the variation in air temperature. the atmosphere has been divided vertically into four layers: (figure shown below) thee troposphere, stratospG,
Define measuring body composition- Total body potassium? It applies the' concept that body cells contain a constant amount of potassium and that its measurement is theref
Types of Surgery : Pulmonary valve replacement using pulmonary or aortic allograft is the procedure of choice. It increases R.V. ejection fraction, decreases R.V. end diastolic p
Explain about the Cheese Making - methods of food processing? Cheese is a way of preserving milk for long periods of time. In this process, the milk in cheese becomes something
Define the Fehling's Soxhlet method (Lane-Eynon method)? This is a titrimetric method that is commonly used in food laboratories to estimate percentage of reducing sugars and t
Define the symptoms in Bone marrow of pernicious anaemia? The nucleated red cells of the marrow are greatly increased. The successive nucleated cell stages in erythropoiesis a
Define about the Centrifuge? Centrifuge is an apparatus consisting essentially of a compartment spun about a central axis to separate contained materials of different specific
Q. From the lumen to the external surface what are the tissues that form the digestive tube wall? From the internal surface to the external surface, the digestive tube wall is
Role of Nerves - Regeneration It has been seen that soon after amputation nerves invade the regeneration blastema. If the stump is denervated by cutting the nerves supplying
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