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.
Determine the term - Validity and reliability With regard to concurrent validity, the criterion used in most cases is the objective identification of some central nervous syste
Microevolution is: the change in allele frequency in a population. Cannot occur if genetic equilibrium is reached. Results in the formation of a new species. Is influenced by mutat
Define r and K Strategists? Ecologists have identified two major types of reproductive strategies among species. Characteristic patterns can be seen among species relating the
What evidence is there that makes it seem humans have more than a material existence?
Q. Explain Tricuspid regurgitation? Though tricuspid regurgitation is a common valvular abnormality on echocardiography rarely is it due to primary organic disease. Secondar
In 1798, British economist and demographer Thomas Robert Malthus, published his' essay on population' in which he stated that: 1. Population increases in a geometric rat
Define Classification - Taxonomy Classification is the arrangement of organisms into groups having common characteristics. These groups are then arranged according to a system.
Oral Route Paediatric Medications are prepared as Tablets (which can be crushed), powders, granules, mixtures, emulsions, elixirs and syrups. It is easier to persuade olde
What is a pH meter? A pH meter is a device used for measuring. pH of any unknown solution. It is composed of: a) A reference electrode b) Glass electrode whose potential
Oxidation-reduction Potential (ORP) ORP is related to the concentration of oxidizers or reducers in a solution, and their activity or strength. It provides an indication of th
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