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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.
Spinal cord Spinal cord is a long and cylindrical structure. It passes through the vertebral column extending all along the dorsal surface of trunk. Vertebrae of the v
Manual and Automatic Toothbrushes Brushing is imperative and soft or medium toothbrushes are recommended. Small heads are useful because they allow better access. Automatic too
Endospores are found in prokaryotes or eukaryotes?
what is the xternal & internal respiration in frog
Determine the following term - Amniote egg Eggs that shelter the developing embryo in a water-filled sac—the amnion. Characteristic of the amniote animals, which include reptil
What is the utility of fungi for some industries? Fungi are industrially used in the production of fermented beverage, cheese, bread etc. Some fungi are very significant for th
what is non conventional feed
Abdomen check the contour of the abdomen; normally it should be soft, symmetrical, slightly round and moves in synchronously with chest in premature neonate abdomen w
why does animals respire??
Q. Fluoxetine is an antidepressant drug that presents an action mechanism related to the synaptic transmission. What is that mechanism? Fluoxetine is a substance that inhibits
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