Pyramid of Trophic Levels

Q. In the given food web identify primary, secondary and tertiary consumers and select the correct option.

1. Primary : Mouse, jackal, rabbit,
   Secondary consumer : Wolf, fox, wild, cat, mouse,
   Teritary consumer : Tiger
2. Primary consumer : Deer,
   Secondary consumer : Jackal, mouse, fox, wolf,
   Tertiary consumer : Wild cat, rabbit
3. Primary consumer : Rabbit, deer, mouse,
   Secondary consumer : Tiger, jackal, fox, wild cat,
   Tertiary consumer : Tiger, wolf
4. Primary consumer : Vegetation,
   Secondary consumer : Rabbit, deer, mouse,
   Tertiary consumer : Fox, wild, cat, jackal, tiger

Q. With reference to the given image of a simple food chain, mouse occupies which trophic level?

1. Producer
2. Primary consumer
3. Secondary consumer
4. Tertiary consumer

Q. Which of the following ecological pyramids cannot be inverted?

1. Pyramid of biomass
2. Pyramid of energy
3. Pyramid of number
4. None of these

Q.

Question 17
In the given Figure 15.1 the various trophic levels are shown in a pyramid. At which trophic level is maximum energy available?


(a) T4
(b) T2
(c) T1
(d) T3

Q. Energy efficiency at each trophic level is 1/10th of the trophic level below. State true or false.

1. True
2. False

Q.

Question 2
In a food chain, the third trophic level is always occupied by

(a) carnivores
(b) herbivores
(c) decomposers
(d) producers

Q.
Given diagram represents the pyramid of biomass. Select the correct order of organisms from the following.

1. A ; Tree, B ; Bird, C ; Small insects, D ; Large insects
2. A ; Dolphin, B ; Tuna, C ; Snail, D ; Phytoplankton
3. A ; Snake, B ; Hawk, C ; Squirrel, D ; Nuts
4. A ; Phytoplankton, B ; Zooplankton, C ; Small fish, D ; Large fish

Q. Match the following.
$\begin{array}{cc}\text{Column - I}& \text{Column - II}\\ \text{A. Producers}& \text{1.Third trophic level}\\ \text{B. Herbivores}& \text{2.Second trophic level}\\ \text{C. Small carnivores}& \text{3.First trophic level}\\ \text{D. Large carnivores}& \text{4.Fourth trophic level}\end{array}$

1. A-3: B-1; C-2; D-4
2. A-2: B-3; C-1; D-4
3. A-3: B-2; C-4; D-1
4. A-3: B-2; C-1; D-4

Q. In grazing food chain, primary consumers (herbivores) represent

1. Trophic level 1
2. Trophic level 2
3. Trophic level 3
4. Trophic level 4

Q. Identify the most appropriate term for the organisms based on their feeding habits.

1. 
2. 
3. 
4. 

Q. Trophic levels are formed by

1. only plants
2. only animals
3. only carnivores
4. organisms linked in food chain

Q. Which of the following contains consumers with the least biomass?

1. Snakes
2. Frogs
3. Crickets
4. Green plants

Q. What are the $3$ prepositions given for transfer of energy in an ecosystem?