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.
Define Functions of fluoride? The only beneficial role demonstrated for fluoride is in reducing the prevalence and severity of dental caries in children and adults. This is en
Q. How many chambers do the mammalian heart and the bird heart have? Concerning temperature maintenance what is the benefit of the double and complete circulation of these animals?
Explain Need For Microbiological Analysis of Environment Samples? Once the food is harvested, it passes through various operating steps before reaching the consumer. These step
Which of the following defines why the vast majority of segregation errors in human patients include the two sex chromosomes (XXY, XO, XYY) or chromosome 21 (triple 21)? A. Th
Q. What does the formula DPD = SF - TP signify? DPD is the short form of diffusion pressure deficit, SF (suction force) is the vacuolar osmotic pressure and TP is the turgor pr
Which of the following is true of energy? a. It can be transferred from one form to another with 100 percent efficiency. b. It can be created from nothing. c. It can be stored i
Benthic Zone - Organisation of the Marine Ecosystem The benthic zone is divisible into sub zones horizontally. These are depicted in a cross section portion of the marine habi
Extruded Starch Cereal products, that are prepared by pumping cereals through a small opening for instance, pasta, Ready-to-eat cereals etc.
Q. What are pioneer species? What is the role of the pioneer species? The Pioneer species are those first species that colonize places where previously there were no living bei
Explain amino acid composition In terms of amino acid composition, high radiation doses such as those required for sterilization (e.g. 25-27Kgy), do not change the content of c
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