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!
Bi-Parental Reproduction
In sexually reproducing metazoans, there are separate and distinct male and female individuals. Each has its own reproductive system and produces one kid of sex cell, spermatozoon or egg. Nearly all vertebrates and many invertebrates have separate sexes, and such a condition is celled dioecious and this type of reproduction is called biparental reproduction. However, some animals such as most flatworms, some hydroids, annelids, crustaceans and some fishes have both male and female organs in the same individual. Such a condition is called hermaphroditism. In contrast to the dioecious state of separate sexes, hermaphrodites are monoecious, having both male and female organs in the same organism Most of the hermaphrodites avoid self-fertilization by exchanging germ cells with each other.
For example, although the earthworm bears both male and female organs, its eggs are fertilised by the copulating male and vice versa. Hermaphrodites also prevent self-fertilisation by developing eggs and sperms at different times. If we admit that all living things are mortal, that every living organism is endowed with a life span that must eventually end, then reproduction is indispensable for the continuance of species. During evolution the efficiency of reproduction increased where the parents protect and provide nutrition for the young before or after birth. The adaptations that are found in vertebrates are internal fertilisation, the cleidoic (enclosed in shell) egg, and the foetal membranes. Parallel adaptations are also found in lower animals.
What are the Techniques of rastelli operations ? After median sternotomy pericardial patch is harvested and then cardiopulmonary bypass instituted using aortic and bicaval cann
Define Importance of Family and Patient Education - Food Allergy? Remember, involvement of the family and all other relevant caretakers along with the patient is crucial for pr
Food Applications of Curdlan Curdlan has a variety of food applications as enumerated herewith: a) Meat and Poultry Curdlan makes meat and poultry products juicier and
Why are the recombinant DNA technology and the nucleus transplantation technology still dangerous? The recombinant DNA technology and the nucleus transplantation technology (cl
Scrapie This is a chronic fatal disease of sheep and occasionally of goats caused by a Prion agent similar to BSE. The disease is reported from Europe, North America and in a f
Explain about the Incidence of defects in color vision Defects in colour vision can either be congenital or acquired. Males are more affected than females. Out of the populatio
Ventilation of Gills Various mechanical devices are used to increase the flow of water over the gill's surface. There can be two means of increasing the flow of water over the
Explain Functional property of Emulsification Mode of action Proteins stabilize fat emulsions Food system Sausages, soups, cakes, salad dressings, infant foods
BLOO D CLOTTING - It is a nature's device to check the excessive loss of blood from an injury. Bleeding time is 1-3 minutes. Clotting time is 2-6 minutes. Process of
Q. What are the cytoplasmic inclusions? Cytoplasmic inclusions are cytoplasmic molecular aggregates, such as organic polymers, pigments and crystals. They are not considered ce
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