Ecosystem and Levels of Organisation

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

Q.

What are the 3 ocean ecosystems?

Q. Which of the following is/are the cause(s) of soil erosion ?

1. Rainfall
2. Overgrazing
3. Reduced vegetation cover
4. Afforestation

Q. Ecosystem is made up of:

1. Plants, Animals
2. Microorganisms
3. Climate, soil and other non living factors
4. All of the above

Q. Describe the following pictures. [Textbook Question 6 pg no. 128]

Q.

Bella recently visited a national park. Which among the following cannot be her observation?

1. Area had a well-defined boundary.
2. Animals and plants were conserved in their natural habitat.
3. People were seen hunting animals.
4. Private ownership was not permitted.

Q.

What are the components of an ecosystem?

Q. Which among the following statement is incorrect about endangered species?

1. Their population is declining drastically.
2. They might become extinct in the near future.
3. Their population is increasing drastically.
4. Natural habitat needs to be protected.

Q. What is flora?

Q. Which of the following is/are the example for a natural ecosystem?

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

Q. Match the given organisms to their species:

$\begin{array}{cc}\text{ORGANISMS}& \text{SPECIES}\\ \text{1) Human beings}& \left(i\right)familiaris\\ \text{2) Pea plants}& \left(ii\right)sapiens\\ \text{3) Dogs}& \left(iii\right)sativum\end{array}$

1. $1)\to (i),2)\to \left(iii\right),3)\to (ii)$
2. $1)\to (ii),2)\to \left(iii\right),3)\to (i)$
3. $1)\to (ii),2)\to \left(i\right),3)\to (iii)$
4. $1)\to (iii),2)\to \left(ii\right),3)\to (i)$

Q. Describe the following pictures. [Textbook Question 6 pg no. 128]

Q.

Which of the following is an example of man-made ecosystem?

1. Aquarium

2. Tissue culture

3. Herbarium

4. Forest

Q. An ecosystem consists of a single population.

1. False
2. True

Q. The basic component of any ecological system is an individual.

1. False
2. True

Q. Life exists in

1. The depths of the ocean
2. Frigid poles of the Earth
3. Geothermal Vents
4. Human Gut

Q.

What are the components of an ecosystem?

Q. Arrange the following ecological hierarchy in the ascending order from top to bottom.

1. Organism
2. Population
3. Community
4. Ecosystem

Q.

The sum of plant species in a given area is called:

1. Flora of that area

2. Endangered species

3. Endemic species

4. Fauna of that area

Q. Which among the following are the laws of ecology?

1. We can only do one thing in nature.
2. We can never do any one thing in nature.
3. Everything need not be connected with everthing else in nature.
4. Everything is connected with everthing else in nature.

Q.

Which of the following is an example of man-made ecosystem?

1. aquarium

2. herbarium

3. forest

4. Tissue culture

Q. ________consists of a community of organisms interacting with their physical environment.

Q. Group of a single type of living organisms in an ecosystem is known as ______.

1. population
2. community
3. flora
4. fauna

Q. Trophic level of an organism is its ________.

1. stage in a food chain
2. stage in an ecological niche
3. axis around the earth
4. energy level in a food web

Q. Choose the correct option with respect to statements X and Y.

X: Marine ecosystems have lesser trophic levels than terrestrial ecosystems.

Y: Most of the phytoplankton is available for consumption and assimilation by primary consumers in aquatic ecosystems.

1. Both X and Y are true
2. Both X and Y are false
3. X is true and Y is false
4. X is false and Y is true