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.
Do you know what the recommendations for fibre are? Well, the crude fibre intake should be 14 g/1000 Kcal. For adult woman 25 g/day and for adult man 38 g/day is desirable.
Define Effect of feeding method on drug availability? The form in which a drug is administered or enters the body can influence its absorption, metabolism or excretion. This be
Q. Define Mushroom Poisoning? Mushroom poisoning is caused by the consumption of raw or cooked fruiting bodies (mushrooms, toadstools) of a number of species of higher fungl.
Define Fluids required for underweight - nutritional care? Take fluids only after a meal instead of with or before meals so that food intake is not reduced. High calorie nouris
Protoplasm Also known as bioplast . It is gelly like & semi liquid in appearance. It is translucent in nature. It is colourless, oderless, viscous, elastic & granu
Which of the following results from the elimination of DNA ligase activity in a cell? A. The oligonucleotide primers will not be removed from the genome - as they often contain
Q. Concerning extracellular digestion what is meant by chemical digestion? Chemical digestion is the series of enzymatic reactions to break macromolecules into smaller ones.
EVOLUTION OF THE CELL All the living organisms are made up of cells. A living cell may be defined as a compartment enclosed by a membrane that consists of several chemical cons
Is the biological species concept subjective or objective? How about the phylogenetic species concept or is it subjective or objective?
Apart from any inherited tendency towards coronary heart disease, what are thought to be the four major risk factors? The four major risk factors for coronary heart disease ar
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