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.
explain why it is essential that muscle cells, during anaerobic respiration, convert pyruvic acid(pyruvate) into lactic acid, even though the conversion results in an accumulation
Distribution Coefficient - Terminologies used in Chromatography? During the purification or separation of the biomolecules it should be kept in mind that two important factors
Define Transport and Storage of Iron? You have seen that transferrin binds both newly absorbed iron and iron released after degradation of haemoglobin. Transferrin is a glycopr
Q. What is the difference between temporal summation and spatial summation of muscle fibers? What is tetany? Spatial summation is the recruiting of new muscle fibers to incr
what is cockroach respiratory system?
discuss why obelia is considered to be a special organism in zoology
Galactose Metabolism Galactose goes to the liver via portal blood and is phosphorylated by galactokinase togalactose- 1 -phosphate (GIP) using ATP as a phosphate donor as s
The American Heart Association (AHA) has recommended the revised Jones Criteria as a guide for ARF diagnosis. The same have been approved by WHO study group for the diagnosis of in
What are plant cell vacuoles? What are their functions? How is the covering membrane of the vacuoles called? Ans) Plant cell vacuoles are cell structures delimited by membranes
What would be the approximate number of amino acids of a protein with a mass of 203 kd? Assume an average molecular weight for amino acids of 110 grams/mol.
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