Short Answer TypeWho was the originator of the theory of Natural Selection ? Explain the evolution of species by this theory.
Write the causative agent and the most important symptom of each of the following diseases :
(i) Whooping cough
(ii) Tuberculosis
(iii) Measles
(iv) Malaria
Differentiate between :
(i) Spontaneous and Induced Mutation.
(ii) Geographical and Reproductive Isolation.
Addiction is a psychological attachment to certain effects-such as euphoria and temporary feeling of well-being associated with drugs and alcohol.
Four reasons for drug addiction :
1. Peer pressure: Peer pressure is a powerful force which can compel one to take up drugs and alcohol. The desire to become socially accepted also drives one towards addiction as saying no can have painful consequences, ranging from being laughed at or mildly teased, to being humiliated, rejected, and even bullied.
2. Curiosity : Often the use of drug is started just out of curiosity to know it feels. Constant description by friends of the good feeling by drug consumption creates a temptation and breaks the barrier in the youngsters.
3. Family history : If any one in the family has a history of taking up drugs, their children also get on to that habit.
4. Excitement and Adventure : The feeling of excitement and adventure that comes along with the use of drugs often makes people to take drugs.
Long Answer Type
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