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The effect of natural selection on colonies or population favouring one group in preference to other may be referred to as group selection. A group can be the smallest collection of individuals within a population or a colony. Group selection, it must be understood, is distinct from selection among individuals. The fitness of the genotypes between groups may vary within a population. The concept of altruism can be extended to groups as well. A colony consisting of many altruists has better chances of survival than a colony consisting of selfish individuals. Let us take hypothetical situatioii where individuals of a colony, reproduce indiscriminately having no regard for the carrying capacity of the environment. On the other hand, consider a colony of individuals with genes restricting population growth, utilising optimally the food sources of the environment. The selection would essentially favour the latter group and the former may eventually face extinction.
Which of the following is a situation in which a closed-loop negative feedback system is converted to an open-loop system? A disease that destroys all the A. V2 Receptors in a
#question.name any two plants having heterotrophic mode of nutrition .
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Explain in detail about the term behavioural neuropsychology Behavioural neuropsychology has been explained as 'the application of behaviour therapy techniques to problems of o
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Foods to be avoided are: High fibre foods like whole grain cereals and their products (e.g. whole wheat flour, cracked wheat, whole pulses) Raw vegetables and fruits Fri
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
Q. How are gases exchanged in sponges? The gas exchange in sponges happens by diffusion from the exterior to the cells that absorb molecular oxygen and liberate carbon dioxide.
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