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!
Q. Biological species concept?
A biological species as defined by Ernst Mayr are "groups of actually or potentially interbreeding natural populations which are reproductively isolated from other such groups". For example there are some species called sibling species that are reproductively isolated although they have extremely minute genetic differences. This definition assumes that a species cannot interbreed with other species due to a variety of isolating mechanisms that are behavioural, physiological, genetic, etc. Thus, according to the biological species concept, individuals within a species have a gene pool available for recombination through sexual reproduction within the group, and is not inhibited by pre - or post -mating reproductive isolation. The main criticism of this definition is that it applies only to organism (i.e. life forms) that have sexual reproduction, and ignores the fact that some times gene flow occurs between closely related, sympatric species (species whose geographical ranges overlap).
For example, significant gene exchange has happened between bison and bus (domestic cattle). Such occurrences violate the basic notion of the biological species concept. Nevertheless, this definition of a species continues to be widely used even today.
What are the classes into which the phylum Arthropoda is divided? What are the three main ones and some of their representative species? The three major classes of arthropods a
Chemical bonding : The present matter of earth contains atoms bound in groups of two or more called molecules. Their binding capacity is called chemical reactivity; It depends upo
Q. Which is the brain region responsible for the regulation of breathing and blood pressure? The neural regulation of breathing, blood pressure and other physiological paramete
Entamoeba Histolytica Losch (1875), for the first time, described the disease symptoms of infection of Entamoeba histolytica. However, it was only in 1903 that Schaudin gave t
Electric Charge - Properties of Colloidal Systems Colloidal particles are electrically charged. Some colloidal particles carry a positive charge (+), others a negative charge (
A common biocontrol agent for the control of plant diseases is : 1. Baculovirus 2. Bacillus thuringiensis 3. Glomus 4. Trichoderma Trichoderma
Define Factors Contribute to the Malabsorption - Radiation Damage? Malabsorption of water, fats, bile salts, carbohydrates, calcium, magnesium, iron and vitamin B 12 occur dur
Define Miscellaneous Functions of Protein? Besides the functions enumerated above certain other important miscellaneous functions of proteins are included herewith. These inclu
E g g drop syndrome-76 (EDS-76) An outbreak of sudden drop in egg production or a failure to achieve a normal peak in production despite optimum managemental and nutrition st
Explain the Maintenance of Weight Loss? Once an individual has managed to lose weight to a desirable level, it must not be assumed that the weight loss will be maintained autom
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