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.
Explain National Programmes Targeting Infants and Preschoolers? Infants and preschoolers are the vulnerable sections of the society. To give them due coverage, some national p
Define issues that are covered by nutrition economics? The issues that are covered by nutrition economics include: 1. Quantities of food commodities and their development in
Production of ATP is an endothermic reaction. How much energy in Kcal is having in 1 molecule of ATP?
Explain of Functional property Browning/Flavour/ Aroma Mode of action Proteins contribute to browning by reacting with lactose and other reducing sugars present in a form
Q. What do you mean by Maxilla? The maxilla has ample keratinized tissue that covers the entire palate. This tissue is well-attached and more difficult to mobilize. Nevertheles
classification of grantia
Classify phylum mollusca?
What is the location of the salivary glands in humans? There are 6 major salivary glands and they are located one in every parotid gland, two beneath the mandibles (submandibul
Define Equilibrium between two solid phases and a gas phase? Consider the following reaction equilibrium: 3 CuO(s) + 2NH 3 (g) ↔ 3 Cu(s) + 3H 2 O (g) + N 2 (g) Accordin
What is meant by the arch reflex? In some situations the movement of the skeletal striated muscles does not depend upon commands of the superior motor neurons, i.e., it is not
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