When will the population density increase, under special conditions? 
When the number of:
1. deaths exceeds number of births and also number of emigrants equals number of immigrants 
2. births plus number of immigrants equal number of deaths plus number of emigrants 
3. birth plus number of emigrants is more than the number of deaths plus number of immigrants 
4. birth plus number of immigrants is more than the sum of number of deaths and number of emigrants
Subtopic:  Population Characters: Density | Population Characters: Natality & Mortality | Population Characters: Age Structure & Migration |
 83%
From NCERT
NEET - 2024
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There are 250 snails in a pond and within a year their number increases to 2500 by reproduction. What should be their birth rate (in per snail per year)?
1. 10 2. 9
3. 25 4. 15
Subtopic:  Population Characters: Natality & Mortality |
From NCERT
NEET - 2023
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The impact of immigration on population density is:

1. Negative
2. Both positive and negative
3. Neutralized by natality
4. Positive

Subtopic:  Population Characters: Density | Population Characters: Natality & Mortality |
 83%
From NCERT
NEET - 2020
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NEET 2025 - Target Batch
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Natality refers to:
1. Death rate
2. Birth rate
3. Number of individuals leaving the habitat
4. Number of individuals entering the habitat

Subtopic:  Population Characters: Natality & Mortality |
 87%
From NCERT
NEET - 2018
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NEET 2025 - Target Batch
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