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!
In the preceding section we emphasised the fact that cvolution or the continuous adaptations to the environment can take place only when pheiiotypes exhibit variability. In the absense of variability, the chances arc that existing living organisms would become extinct since with the change in the environment these organisms would die without leaving progeny. Fortunatcly in living systems mutations and recombinations generate the required variability. However, organisms often strive to arrive at populations which are more or less uniform. This is possible because selection process acts in such a way that a certain degree of uniformity of phenotype is imposed among individuals of n population. If an individual were to be vcry different in some way from thc rest of the population. he would be less well adapted to the environment as compared to other members of the population and therefore unable to compete successfully with them. However, in a continuously changing environment, a slight phenotypic variability should be maintained in a population. In a changing environment no phenotype remains optimally adapted for long. This is the precise reason why variability needs to be generated continuously in a population and used to develop adaptations in the way Darwin suggested. We shall look into the mechanisms that generate variability.
The nature of the sounds produced by percussion (tapping) a patient's chest can tell a physician a great deal about the condition of the organs within the thoracic cavity. Healthy,
give an account of specific characters of phylum porifera
The principle of homeostasis is controlling the heating system with a simple thermostat in a house. These components are essentials thermometer, source of heat turning it on or off
as newly appointed food safety manager within a medium seized
What are the possible effects on the fetus if, during pregnancy, the mother (a) smokes, (b) catches rubella? a) Smoking during pregnancy can lead to an underwe
assignment order
discuss why obelia is considered to be of special interest in zoology as an animal showing an intermediate grade of organisation
How are they produced?
A field trip to observe flowers:- Plan a field trip to view flowers in bloom. If no interesting wildflowers can be found growing near the school, the trip can be planned to a p
ASSISTING IN PROCEDURE OF BIOPSY Biopsies are removal of a small piece of tissue for examination under microscope. Such examinations are called hist to pathological examina
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