- 1(current)
Q. No.A biologist studies the population of rats in a barn.
He found that the average natality was 250, average
mortality is 240, immigration is 20 and emigration to be
30. The net increase in population is
1. 10
2. 15
3. 05
4. Zero
Subtopic: Population Characters: Density |
83%
Level 1: 80%+
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Hints
Please attempt this question first.
Population size in any given habitat is also known as _______
| 1. | Population cluster |
| 2. | Population explosion |
| 3. | Population abundance |
| 4. | Population density |
Subtopic: Population Characters: Density |
93%
Level 1: 80%+
Hints
Links
In a pond with 50 frogs, if 5 frogs are added due to immigration and 3 die within a week, the population density
change would be:
1. +3
2. +2
3. -2
4. 0
change would be:
1. +3
2. +2
3. -2
4. 0
Subtopic: Population Characters: Density | Population Characters: Natality & Mortality |
90%
Level 1: 80%+
Please attempt this question first.
Hints
Please attempt this question first.
Which of the following would necessarily decrease the density of a population in a given habitat?
| 1. | Natality> mortality |
| 2. | Immigration> emigration |
| 3. | Mortality and emigration |
| 4. | Natality and immigration |
Subtopic: Population Characters: Density |
90%
Level 1: 80%+
Hints
During a certain period, density of a population in a particular habitat increases due to changes in
A. Mortality
B. Natality
C. Emigration
D. Immigration
E. Migration
Choose the correct answer from the options given below:
1. A and C only
2. A and E only
3. B and D only
4. C and E only
A. Mortality
B. Natality
C. Emigration
D. Immigration
E. Migration
Choose the correct answer from the options given below:
1. A and C only
2. A and E only
3. B and D only
4. C and E only
Subtopic: Population Characters: Density | Population Characters: Natality & Mortality |
91%
Level 1: 80%+
Please attempt this question first.
Hints
Please attempt this question first.
Population growth of a species is not related to which of the following parameters?
| 1. | Nt + 1 = Nt + [(B + I) − (D + E)] |
| 2. | Out of the four basic processes effecting population growth three leads to increase in population size |
| 3. | For a newly colonised habitat immigration plays major role than birth rate |
| 4. | Under normal conditions, natality and mortality are the most important factors |
Subtopic: Population Characters: Density |
88%
Level 1: 80%+
Hints
A population has more young individuals compared to older individuals. What would be the status of the population after some years?
| 1. | It will decline |
| 2. | It will stabilize |
| 3. | It will increase |
| 4. | It will first decline and then stabilize |
Subtopic: Population Characters: Density |
83%
Level 1: 80%+
Hints
- 1(current)
Q. No.
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