Population
ICSE · Class 10 · Biology
Flashcards for Population — ICSE Class 10 Biology. Quick Q&A cards covering key concepts, definitions, and formulas.
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Explore the full setWhat is population? Define it in biological terms.
Answer
Population is a group of interbreeding individuals of a species present in a geographical region. For humans, it refers to the number of males and females of different age groups present within a geog…
What is demography?
Answer
Demography is the statistical study of human population. It involves the study of population growth, its composition (age, sex-ratio) and its distribution in space.
Define population density and give its unit.
Answer
Population density is the number of individuals of a population per square kilometre at a given time. Its unit is individuals per square kilometre (individuals/km²).
What is natality or birth rate?
Answer
Natality or birth rate is the number of live births taking place per year per thousand individuals of a population. It is expressed as births per 1000 people per year.
Define mortality or death rate.
Answer
Mortality or death rate is the number of deaths occurring per year per thousand individuals of a population. It is expressed as deaths per 1000 people per year.
How is growth rate calculated?
Answer
Growth rate is the difference between birth rate and death rate. Growth Rate = Birth Rate - Death Rate. If positive, population increases; if negative, population decreases.
What was India's population in 1901 and what is it estimated to be currently?
Answer
India's population was about 24 crores (240 million) in 1901. Currently, it is estimated to be around 1.28 billion, making India the second most populous country in the world after China.
List any four causes of rapid population growth in India.
Answer
1. Advancement in Agriculture - better food availability 2. Advancement in Medicine - increased life span 3. Religious and Social Customs - resistance to family planning 4. Illiteracy - lack of awaren…
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