Ecosystem

Q. In the below given terrestrial food web, which animal is tertiary consumer of longest food chain?

1. Tiger
2. Wolf
3. Wild cat
4. Fox

Q.

Why are manure and fertilizers used in the field?

Q. Environmental balance is maintained by:

1. Water cycle
2. Gaseous cycle
3. Food chains of the ecosystem
4. Global warming

Q.

Question 44
What would happen if green plants disappear from the earth?

Q.

The various levels in the food chain are called:

1. Trophic levels

2. Nutrition levels

3. Ecosystem levels

4. Energy levels

Q. Grassland food chain is an example of ______ step food chain

1. 2
2. 3
3. 4
4. 5

Q. Which one of the following is not a functional unit of an ecosystem?

1. Productivity
2. Stratification
3. Energy flow
4. Decomposition

Q. Which ecosystem has the maximum biomass?

1. Forest ecosystem
2. Grassland ecosystem
3. Pond ecosystem
4. Lake ecosystem

Q.

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

1. Tissue culture

2. aquarium

3. herbarium

4. forest

Q. How many of the following are examples of anthropogenic ecosystem?
$\begin{array}{cccccc}Cropfield,& Parks,& Aquarium,& Forests,& Desert,& Garden\end{array}$

1. Two
2. Three
3. Four
4. Five

Q.

Few lines about nature for class 1.

Q.

Human beings depend on the resources of__.

Q. The interaction of organisms and their physical environment is known as ________.

1. habitat
2. environment
3. ecology
4. ecosystem

Q. An organism's specific role in its habitat is called ___ .

Q.

Out of the following which is an artificial ecosystem?

1. Lakes

2. Garden

3. Ponds

4. Forests

Q.

How does trampling affect plant growth?

Q.

Human existence is possible even without the existence of nature.

1. True
2. False

Q.

Why should we value the benefits of the coastal ecosystem?

Q. Which of the following is/are the example(s) of a natural ecosystem(s)?

1. Agricultural farmlands
2. Forest
3. Pond
4. Desert

Q.

What is the mineral that is present in chlorophyll ?

Q. In a food chain, herbivores are

1. Primary producers
2. Primary consumers
3. Secondary consumers
4. Decomposers

Q.

Some plants and animals live in water and some others live on land.

1. False

2. True

Q.

Name the third trophic level in the following food chain:

$Plant\to Insects\to Frogs\to Snakes\to Hawks$

Q.

A pond is a

1. A natural ecosystem

2. A biome

3. An artificial ecosystem

4. A community of plants and animals only.

Q. Temperature, rainfall, wind, soil and minerals are

1. Physical factors
2. Abiotic components
3. Living components
4. Both (a) and (b)

Q.

Question 1
Which one of the following is an artificial ecosystem?

(a) Pond
(b) Crop field
(c) Lake
(d) Forest

Q.

Food chains generally consist of only three or four steps because:

1. Only four trophic levels can be formed

2. All organisms are covered in these steps

3. The food chain will break down

4. Very little usable energy is left after fourth step

Q.

Mineralization is the process of converting simple organic substances into simple inorganic substances.

1. True
2. False

Q. "Life developed from simple inorganic molecules which were present on the Earth". This theory was proposed by:

1. Darwin
2. Urey
3. Miller
4. Haldane

Q.

Why does a food chain normally consist of only 4-5 steps?