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.
Renal parenchymal disease is the commonest cause of secondary hypertension. Hypertensive and diabetic nephropathy and chronic glomerulonephritis are the main causes. Eventually, t
Vitro Fertilization - Human Development In case a woman cannot conceive due to her uterine tubes are blocked she can become pregnant by means of in vitro fertilization. In thi
Q. Explain about ABCC11 GENE? Wax in the external canal of the human ear may be wet or dry. Whether earwax is wet or dry has been traced to a gene called ABCC11, found on ch
Explain the Drug Effects on Nutritional Status? Drugs can affect nutritional status in a number of ways i.e. by enhancing excretion of certain nutrients, by interfering with nu
Prophylaxis High-risk neutropenic patients, such as those undergoing allogeneic and certain autologous stem cell transplants, and those with hematologic malignancy who are exp
Q. What is the name of the cytoplasm division in the end of mitosis and what are the differences in this process between animal and plant cells? Cytoplasm division occurs afte
Starr-Edward (S-E) Silastic Ball Valve Prosthesis : This was introduced in 1961 by Albert Stm and has different models for mitral and aortic positions. It is a cage and b
Explain Energy demand for Sedentary or Light Activity Lifestyles? These people have occupations that do not demand much physical effort, are not required to walk long distances
Use of trichomoniasis in pregnancy Trichomoniasis in pregnancy has been associated with adverse pregnancy outcomes (D Soper, Am J Obstet Gynecol 2004; 190:281). Metronidazole
Q. What is the kind of digestive system present in beings of the phylum Arthropoda? Are these animals deuterostomes or protostomes? The digestive tube of arthropods is complete
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