The correct answer is option A
A person that is having an allergy with pollen grains should take antihistamines.
When there is an allergic reaction in the body then the body releases histamines which evokes immune response.
As a result of this the person starts sneezing, runny nose, hives et cetera.
So, one should take antihistamines to prevent the action of histamines on the body.
Founder effect is the example of migration of a random few individuals from one population to a new area to establish a new population.Thus, option C is correct.
What is migration?
Migration is defined as movement of individuals from one place to another in search of employment and livelihood.Some people lives permanently after migration and some returns back to the native place.
Internal migration is the type of migration in which people migrate within state and country.
External migration is the migration to different state and country.
The phenomenon of moving into new place is known as immigration.
Seasonal migration is the migration in which animals or humans migrate in a particular season due to climatic condition.
Therefore,migration of a random few individuals from one population to a new area to establish a new population is an example of founder effect.
Learn more about migration here:
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The question is seems to be incomplete the question is may be like that
Migration of a random few individuals from one population to a new area to establish a new population is an example of _
A) bottleneck effect
B) mutation
C) founder effect
D) selection
The answers are
1. nitrogenous
2. acid-base
3. fluid
