Select Chapter Topics:
Q. No.Biosphere is
| 1. | a component in the ecosystem |
| 2. | composed of the plants present in the soil |
| 3. | life in the outer space |
| 4. | composed of all living organisms present on earth which interact with the physical environment |
Subtopic: Organisms and its Environment (OLD NCERT) |
91%
Level 1: 80%+
Hints
Geometric representation of age structure is a characteristic of:
1. Biotic community
2. Population
3. Landscape
4. Ecosystem
Subtopic: Population Characters: Age Structure & Migration |
81%
Level 1: 80%+
AIPMT - 2007
Hints
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 |
Level 3: 35%-60%
NEET - 2023
Hints
If '8' Drosophila in a laboratory population of '80' died during a week, the death rate in the population is ___________ individuals per Drosophila per week.
| 1. | zero | 2. | 0.1 |
| 3. | 10 | 4. | 1.0 |
Subtopic: Population Attributes |
80%
Level 1: 80%+
NEET - 2022
Hints
A country with a high rate of population growth took measures to reduce it. The figure below shows age-sex pyramids of populations. A and B are twenty years apart. Select the correct interpretation about them:
Interpretations
| 1. | 'A' is more recent and shows a slight reduction in the growth rate |
| 2. | 'B' is an earlier pyramid and shows stabilised growth rate |
| 3. | 'B' is more recent showing that the population is very young |
| 4. | 'A' is the earlier pyramid and no change has occurred in the growth rate |
Subtopic: Population Characters: Density | Population Characters: Age Structure & Migration |
50%
Level 3: 35%-60%
AIPMT - 2009
Hints
What type of human population is represented by the following age pyramid?
1. Stable population
2. Declining population
3. Expanding population
4. Vanishing population
Subtopic: Population Characters: Age Structure & Migration |
84%
Level 1: 80%+
AIPMT - 2011
Hints
Links
The age pyramid with broad base indicates:
1. high percentage of old individuals
2. low percentage of young individuals
3. a stable population
4. high percentage of young individuals
1. high percentage of old individuals
2. low percentage of young individuals
3. a stable population
4. high percentage of young individuals
Subtopic: Age Pyramid |
82%
Level 1: 80%+
NEET - 2013
Hints
In a growing population of a country:
| 1. | pre-reproductive individuals are more than reproductive individuals. |
| 2. | reproductive individuals are less than post-reproductive individuals. |
| 3. | reproductive and pre-reproductive individuals are equal in number. |
| 4. | pre-reproductive individuals are less than reproductive individuals. |
Subtopic: Population Attributes |
87%
Level 1: 80%+
NEET - 2018
Hints
Links
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
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
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