Introduction to Ecosystem and Broad Categories

Q.

Give two examples of man-made ecosystem.

Q.

The second trophic level in a lake is

1. Phytoplankton

2. Zooplankton

3. Benthos

4. Fishes

Q.

What kind of habitat do fishes live in?

Q. Assertion: As per ecologists, a stable community must be resistant to invasion by alien species.
Reason: It must be resistant to occasional disturbances by nature or human beings.

1. Both the assertion and reason are true and the reason is the correct explanation of the assertion
2. Both the assertion and reason are true but the reason is not the correct explanation for the assertion
3. The assertion is true but the reason is false
4. Both assertion and the reason are false

Q. Which of the following is not true for man-made ecosystem ?

1. They are highly efficient
2. Parks and aquarium are not man-made ecosystems.
3. They lack the diversity of natural ecosystems
4. They mainly comprise seasonal vegetation or one chosen crop

Q. What is ecosystem ? Explain the structure of ecosystem and draw a diagram of trophic levels of an ecosystem.

Q.

Environment Which Has Been Modified by the Human Activities Is Called

Q.

Microservices Based Architecture Prefers _______

1. RDBMS

2. No SQL DBs

3. No Dependency On Any Particular DB

4. None of these

Q.

Why living things live in different habitats?

Q.

Is an aquarium a complete ecosystem?

Q.

To fill $12$ vacancies there are $25$ candidates of which five are from scheduled caste. If $3$ of the vacancies are reserved for scheduled caste candidates while the rest are open to all, then the number of ways in which the selection can be made?

1. ${}^{5}C_3\times {}^{22}C_9$

2. ${}^{22}C_9-{}^{5}C_3$

3. ${}^{22}C_9+{}^{5}C_3$

4. None of these

Q. Define an ecosystem. Explain it with a suitable example.

Q. Artificial ecosystems are characterised by

1. high productivity
2. high diversity
3. complex food chains
4. more cycling of nutrients

Q. From the food web given below, which of the following options is correct?

1. Secondary consumer: Frog, Tertiary consumer: Owl
2. Primary consumer: Fox, Tertiary consumer: Frog
3. Tertiary consumer: Rabbit, Primary consumer: Hawk
4. Producer: Rabbit, Primary consumer: Snake

Q.

There is a great concern all over the world to conserve biodiversity for maintaining ecological balance in nature. Explain giving three reasons. Write different ways that have helped in increasing tiger population in our country. [5 marks]

Q.

Which of the following pair is not correct?

1. Tansley - Coined The Term Ecosystem.

2. R. Mishra - Father Of Indian Ecology.

3. E. Haeckel - Coined The Term Ecology.

4. None Of These

Q. Why are green algae not likely to be found in the deepest strata of the ocean?

Q.

What is the biggest ecosystem?

Q. The lentic ecosystem includes

1. Gravitational water
2. Rain water
3. Running water
4. Standing water

Q. Correct sequence of plants in a hydrosere is :

1. Pistia→Volvox → Scirpus → Hydrilla →Oak →Lantana
   
2. Oak → Lantana → Volvox → Hydrilla → Pistia → Scirpus
   
3. Oak → Lantana → Scirpus → Pistia → Hydrilla → Volvox
   
4. Volvox → Hydrilla → Pistia → Scirpus → Lanatana → Oak
   

Q.

You want to determine the number of students in your school who have visited a science museum. You survey $50$ students at random. Twenty have visited a science museum, and thirty have not. So, you conclude that $40\%$ of the students in your school have visited a science museum. Is your conclusion valid? Explain.

Q. Arctic Tundra are :

1. Located in rain shadow
2. Lowest altitudinal biome
3. Highest altitudinal biome
4. Characterised by Capparis and Prosopis species

Q. The term ecosystem was coined by :

1. E.P. Odum
2. A.G. Tansley
3. E. Haeckel
4. E. Warming

Q. Which of the following is/are effect(s) of biodiversity loss in general?
I. Decrease in plant production
II. Lowered resistance to environmental perturbation
III. Decreased variability in some ecosystem processes

1. I and II
2. II and III
3. Only I
4. I, II and III

Q.

How are ecosystems being affected?

Q. Why is biodiversity necessary and why should it be conserved?

Q. The biotic and abiotic components interacting with each other in a pond form

1. a biome
2. a population
3. a community
4. an ecosystem

Q. Taking an example of a small pond, explain how the four components of an ecosystem function as a unit.

Q. Who coined the term ecosystem?

1. Tansley
2. Odum
3. Warming
4. Darwin

Q. Which of the following constitutes the largest ecosystem of the world?

1. Ocean
2. River
3. Forest
4. Grassland