Ecosystem

Q.

Which one of the following is an artificial ecosystem?

1. Pond

2. Crop field

3. Lake

4. Forest

Q.

Why The Food Web Is More Important For A Stable Ecosystem?

Q.

How do humans affect energy flow ecosystems?

Q. The functional unit of biosphere which plays a major role in balancing and maintaining equilibrium in nature is:

1. Species of plants and animals

2. Biotic community

3. Ecosystem

4. Biome

Q.

What do you mean by biodegradable and non-biodegradable substances? Give an example of each.

Q.

The food relation from grass $\to$ deer $\to$ tiger $\to$ decomposer is called ___.

Q. What is the difference between thigmotropism and thigmonasty?

Q.

Write a short note on biotic components of the environment.

Q.

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

1. Forest

2. Pond

3. Garden

4. Desert

Q.

Explain the stability of the ecosystem.

Q.

Which of the following statements about an ecosystem is not true?

1. An ecosystem is a self-contained area

2. An ecosystem comprises of only abiotic components

3. An ecosystem helps to establish interdependence between living and non-living things

4. An ecosystem comprises of biotic as well as abiotic components

Q.

Overgrazing causes

1. Negative pollution

2. Positive pollution

3. Soil erosion

4. Reduction in crop yield

Q.

Name a pathogen that can attack insects and other such arthropods.

Q. ________ consists of a community of organisms interacting with their physical environment.

Q.

Deer eats only plant products and so, is called ______________

Q. Which of the following is an example of a natural ecosystem?

1. Forests and gardens
2. Ponds and lakes
3. Croplands and prairies
4. Environment

Q.

Ecological pyramids were developed by which of these following?

1. Louis Pasteur

2. Charles Darwin

3. Charles Elton

4. Gregor Mendel

Q.

What is marine biota?

Q.

The term __ is derived from the Greek word "Oikos".

Q.

What are ozone depleting substances ?

Q. use dead organic matter as food.

1. Parasites
2. Autotrophs
3. Saprophytes

Q. Biosphere is ___.

1. a component in the ecosystem
2. composed of the plants present in the soil
3. life in the outer space
4. the area of earth where life exist

Q.

In the given image, the grasshopper is a ______.

1. Top consumers

2. Producers

3. Primary consumers

4. Secondary consumers

Q.

Assertion: Ozone is getting depleted due to $\mathrm{CFCs}$.

Reason: With the depletion of the ozone layer more UV radiation filters into the troposphere.

1. Both assertion and reason are true and reason is the correct explanation of the assertion.

2. Both assertion and reason are true and reason is not the correct explanation of the assertion.

3. Assertion is true but reason is false.

4. Assertion is false but reason is true.

Q.

The __(biotic/ abiotic) components of a forest constitute of sunlight, air and water.

Q. Assertion: Plastic being light in weight and easy to handle is used as a substitute for glass and metal.
Reason: We should avoid plastics as far as possible.

1. Both assertion and reason are correct and the reason is the correct explanation of assertion.

2. Both assertion and reason are correct, but the reason is not the correct explanation of assertion.

3. The assertion is correct but the reason is incorrect.

4. The assertion is incorrect but the reason is correct.

Q.

How can we recycle paper?

Q. Ecosystem consists of:

1. biotic components only
2. abiotic components only
3. flora only
4. both abiotic & biotic components

Q.

The ________ rays that strike the earth result in the depletion of the ozone layer.

Q.

Tertiary consumers prey upon carnivores.

1. True
2. False