- 1(current)
Q. No.When will the population density increase, under special conditions?
When the number of:
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: Â Population Characters: Density |Â Population Characters: Natality & Mortality |Â Population Characters: Age Structure & Migration |
 84%
Level 1: 80%+
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: Â Population Characters: Natality & Mortality |
Level 3: 35%-60%
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: Â Population Characters: Density |Â Population Characters: Natality & Mortality |
 85%
Level 1: 80%+
NEET - 2020
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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: Â Population Characters: Natality & Mortality |
 87%
Level 1: 80%+
NEET - 2018
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- 1(current)
Q. No.
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