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Natural selection can therefore mean differential reproduction among members of the sarne gene pool. We earlier said that selection would promote those alleles that give rise to phenotypes that are better adapted to a given environment. In other words, the frequencies of 'such alleles would tend to increase and those of ill-adapted ones would tend to decrease. What we are sayingis that natural selection is a matter of changes in gene frequencies. Differential reproduction has a dual role to perform. One it leads to or maintains adaptations and therefore determines whether individuals of a population or species will survive; and two, it is a process which determines what changes will occur in the frequencies of alleles in a gene pool of sexually reproducing individuals.
Explain in detail about Male Reproductive System The male reproductive organ consists of the following: A pair of testes, held in scortum; produces spermatooa and testoster
A diploid cell contains three pairs of homologous chromosomes designated C1 and C2, M1 and M2, and S1 and S2; no crossing over occurs. What possible combinations of chromosomes
Q What are the two major classes into which fishes are divided? Ans. Fishes are divided into two major classes: osteichthyes, bony fishes (tuna, sardines, salmons) , and chondr
Explain the Interaction of Vitamin A with Vitamin E? Of the various nutrients, the interaction of vitamin E, proteins, zinc and iron with vitamin A is of significance. Know? Le
What are abiotic factors? The Abiotic factors are the nonliving elements that constitute a given environment, like light, temperature, water, minerals, gases, atmospheric press
What is a biome? A biome is the prevailing ecosystem constituted by similar abiotic and biotic factors present in one or more regions of the planet.
Say about thikka desease of ground nut
Dinitrophenol, DNP, was prescribed in low doses in the 1940's to help obese patients lose weight. It's use for this purpose was discontinued when several users died. DNP makes the
what is a hard connective tissue?
Q. Since among the 64 codons of mRNA 61 codify amino acids that form polypeptide chains what are the functions of the three remaining codons? Since there are 20 amino acids and
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