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While explaining the concept of natural selection, we have stressed the fact that natural selection is synonymous with differential or non-random reproduction. Natural selection aims at the multiplication of those genes that contribute to the reproductive success of the population. In other words, if any gene does not in any way contribute to the reproductive success of the species, the chances are it may be eliminated from the population. Certain critics of Darwin pointed out that the common altruistic behaviour of individuals provided evidence contrary to the theory of natural selection, Whether it is so or not, will be discussed in the following subsections.
Define the terms umbra and penumbra, and describe how they relate to solar eclipses.
In a neuron at rest, the membrane A. voltage will be less than zero. B. sodium conductance is greater than the membrane potassium conductance. C. voltage is less than the
What is dry mass? When the biomasses are compared often the concept of dry mass is used. The dry mass is the entire (total) mass less the water mass of an individual. The total
Illustrate the Respiratory System In general, respiration and breathing are understood to be same. But it is not so. Breathing simply means taking in oxygen from air and giving
what are the etiological agents of malaria
How Ignorance and Poor Socioeconomic cause PEM? Status Improper childcare, either as a result of lack of knowledge or lack of time for mother, could also contribute to the onse
Class of Mollusca - Aplacophora Worm-like, no shell, head or excretory organs mantle with chitinous cuticle or scales or spicules mantle cavity posterior. Aplacophorans are a
What is Respiratory System explain their functionality ? The respiratory system is responsible for the transport of oxygen and carbon dioxide from outside the body to and from
Chemical Properties of Fatty Acids Esterification Like any other organic acid, fatty acids also form esters with various alcohols. An alcohol such as glycerol is reacted
Which of the following serves as an actuating signal, or as part of an actuating signal, in a system with feedback? (Either positive feedback or negative feedback) A. Blood pla
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