Trophic Levels

Q.

Pyramid of numbers represent the number of organisms at each level with respect to size.

1. True

2. False

Q.

A graphic representation of number of individuals of different species belonging to a particular trophic level in an ecosystem is known as Pyramid of Numbers. True or False?

1. ecological pyramid

2. pyramid of biomass

Q.

Producers in an ecosystem are also known as

1. Scavengers

2. autotrophs

3. heterotrophs

4. decomposers

Q. If a single plant species is removed from a food web, then most likely

1. An animal species will fill the unoccupied niche
2. Other plants will produce enough food for herbivores
3. Dependent herbivores will have to find new food sources
4. Carnivores will be affected by the loss

Q. Food chain consists of a series of organisms each dependent on the next for food. State true or false.

1. False
2. True

Q.

Question 2
What is the role of decomposers in the ecosystem?

Q.

Which one of the following correctly represents a food chain?

1. Frog Eagle → Grasshopper → Grass

2. Grass → Grasshopper → Frog →Snake →Eagle

3. Grasshopper → Grass→ Snake → Frog → Eagle

4. Eagle → Snake → Grasshopper→ Grass

Q. Soil formation is done by both abiotic and biotic.click the names of these factors by classifying them as abiotic and biotic

Q.

Question 1
Organisms which prepare food for themselves using simple naturally available raw materials are referred to as

(a) heterotrophs
(b) autotrophs
(c) parasites
(d) saprophytes

Q.

Which of the following correctly represents the order of trophic levels?

1. Primary consumer→ Producer→Tertiary consumer→ Secondary consumer

2. Producer→ Secondary consumer→Primary consumer→ Tertiary consumer

3. Producer→ Primary consumer→ Tertiary consumer→ Secondary consumer

4. Producer→ Primary consumer→ Secondary consumer→Tertiary consumer

Q. Which among the following is the correct sequence of food chain from a lower trophic level to a higher trophic level?

1. Grass $\to$ Insect $\to$ Frog $\to$ Snake
2. Frog $\to$ Grass $\to$ Insect $\to$ Snake
3. Snake $\to$ Frog $\to$ Insect$\to$ Grass
4. Grass $\to$ Snake $\to$ Frog $\to$ Insect

Q.

What does lion represent in the given picture?

1. Detritivore

2. Top carnivore

3. Omnivore

4. Producer

Q.

Identify the autotrophs from the following:

1. They bind to the substrate and the complex reduces the activation energy

2. They induce changes in the chemical state of the substrate leading to increase in the speed of the reaction

3. The speed increases due to the increase in heat during the ES complex formation

4. The reaction is catalyzed by free energy change

Q.

The major role in maintaining food and energy levels in an ecosystem is played by:

1. Decomposers

2. Autotrophs

3. Heterotrophs

4. Parasites

Q.

Question 32
What are decomposers? What will be the consequence of their absence in an ecosystem?

Q.

Which of the following are the correct terms used for the group of organisms mentioned below?

1. Grass, Fern, Moss

2. Lion, Cow, Rat

3. Bacteria, Fungi

1. 1- decomposers, 2- producers, 3- consumers

2. 1- herbivores, 2- decomposers, 3- parasites

3. 1- carnivores, 2-herbivores, 3- saprophytes

4. 1- producers, 2- consumers, 3- decomposers

Q. A pyramid of numbers is always upright.

1. True
2. False

Q. Imagine a condition when all plants n animals food sources get depleted from the earth think n devise upon new ways of generating food from other sources and make a balanced diet of it

Q.

The energy source for decomposers are ___ in the environment.

1. dead and decaying matter

2. animals

3. insects

4. plants

Q. Draw a line diagram of a simple food web.

Q. An ecosystem has only one huge banyan trees. If we draw a pyramid, indicating the number of organisms in this ecosystem, How would the pyramid be?

1. Upright
2. Inverted
3. Spindle shaped
4. Both A and B

Q. All of these are biotic factors except:

1. Trees
2. Mushrooms
3. Squirrels
4. Bacteria
5. Soil

Q. Match the following organisms with their trophic levels.​

A. Grass	1. Third trophic level​
B. Vulture	2. Fourth trophic level
C. Tiger	3. Second trophic level​
D. Antelope	4. First trophic level​

Q. How can we distinguish plants from rest of the organisms?

Q.

The higher the ______ of an ecosystem, the higher its _______.

1. (i)Altitude (ii)species
2. (i)Biodiversity (ii)latitude
3. (i)Productivity (ii)biodiversity
4. (i)Temperature (ii)adaptations

Q. Pyramid of numbers in grassland ecosystem is

1. Linear
2. Upright
3. Inverted
4. Spindle-shaped