BIOLOGY IN HUMAN WELFARE
HUMAN HEALTH AND DISEASE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Disease attack
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Presence of predator
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Climate change
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Growth of organism
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Detailed explanation-1: -Food, water, shelter, predation, and density are all things that can allow a population to grow or cause it to decline. Limiting factors like food and water are necessary resources for all organisms; without them they will die so these factors directly affect population size.
Detailed explanation-2: -Immigration is the permanent inward movement of some individuals coming from outside into an existing population. This increases population density and would not limits growth.
Detailed explanation-3: -When demographers attempt to forecast changes in the size of a population, they typically focus on four main factors: fertility rates, mortality rates (life expectancy), the initial age profile of the population (whether it is relatively old or relatively young to begin with) and migration.