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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.
(i) Area uses or permit exposure to radiation should be Marked' Restricted Area 'or Radiation zone etc. (ii) Avoid x-rays of chest and lower back in routine physic
Q. What are the two major morphological patterns of cnidarians? Concerning locomotion how do these forms differentiate from each other? Morphologically, cnidarians classify as
The different organs of the respiratory system Nostrils through which we inhale air in the nasal cavity Pharynx Larynx Trachea (wind pipe) Lungs - Bronchi,
Determine about the prokaryotic cell While we describe in detail the structure of a eukaryotic cell, it will be useful to examine the structural features of a typical prokaryot
#White blood cell has mainly 5 types right? which is Neutrophil,Monocytes,lymphocytes, basophil and Eosinophil? I wwanted to know is phagocytes a white blood cell, if yes then why
Aneuploidy : One or inore chron~osomes of a normal set nlay bc lacking or present in excess. The term riullison~y refers to absence of both the chromosomes of a pair. Monosomy, tri
Direct demonstration of the causative agent by electron microscopy (EM): Where facilities for electron microscopy are available and a viral disease is suspected, presence o
1. The level of organization intermediate between unicellular and the multicellular - organisms are composed of multiple cells but these fail to exhibit specialization of those cel
Pyruvate kinase catalyzes the third irreversible move in glycolysis. It is activated by fructose 1, 6-bisphosphate. The ATP and amino acid alanine allosterically inhibit the enzy
Q. What are the three kinds of respiration in which the circulatory system transports gases? The circulatory system has an important role in branchial respiration, cutaneous re
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