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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.
a) Donald is a 50 year old male with a long history of bipolar disorder. He has been hospitalized three times in the last 8 months for manic episodes. He was just admitted to your
Q. In arthropods why isn't gas exchange done through cutaneous diffusion? In arthropods the impermeability of the exoskeleton makes the way of gases difficult. In addition the
Carboxypeptidase The inactive zymogen procarboxypeptidase is activated by trypsin .The further action on the polypeptides is carried out by carboxypeptidase which attac
Q. What are mycotoxins and How are they harmful? • Mycotoxins are toxins (secondary metabolites) produced by filamentous fungi on food and feed that cause illness when ingested
Describe Pharmacologic Agents in amyl nitrite ? Amyl Nitrite : It produces vasodilatation which initially results in marked fall in BP and in the next 30-60 seconds there is
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What role do catalysts play in chemical reactions? By decreasing the activation energy that is required for a reaction, a catalyst permits the reaction to proceed spontaneously
WHAT ARE TYPES OF EGG
Define Reagents for Determination of the Iodine Number of Lipids? The following reagents are required to conduct this experiment. 1. Hanus solution (Iodine monobromide solut
General characters of aschelminthes
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