Answer O. No 17. 20 contain five sub-parts each. You are expected to answer any four sub-parts in these
questions.
17. Read the following and answer any four questions from 17 (1) to 17 (v).
Food chain is the feeding interaction between organisms of different populations in an ecosystem. It
describes the sequence of energy from one population to the next. In food chain different organisms
of an ecosystem are linked together by their nutritional requirements.
The figure shows the different types of food chains found in nature.
Quarternary consumers
or
consumers
HE
Top consumers
Tertiary
Eagle
consumers
Crane
Snake
Secondary
Large fish
Primary
Lion
Frog
consumers
Small fish
Elephant
Deer
Grasshopper
Aquatic
Green plant
plants
Green grass
A
B
С
(i) The type of food chain marked as A in the figure is
(a) aquatic
(b) forest (c) grassland
(d) desert
(ii) Which of the food chain in the above figure is a figure step food chain?
(a) A
(6) B
(c) C
(d) None of these
(iii) The three main trophic levels on which the food chains A based are
(a) herbivore, producer, carnivore (6) carnivore producer, herbivore
(c) carnivore, herbivore, producer (d) producer herbivore, carnivore
(iv) The type of food chain given in C is
(a) aquatic
(6) grassland
(c) desert
(d) forest
(v) The snake in the type of food chain C is
(a) Primary consumer
(b) Secondary consumer
(C) Tertiary consumer
(d) top consumer
18. Read the following and answer any four questions from 18 to 18
Answers
Answer O. No 17. 20 contain five sub-parts each. You are expected to answer any four sub-parts in these
questions.
17. Read the following and answer any four questions from 17 (1) to 17 (v).
Food chain is the feeding interaction between organisms of different populations in an ecosystem. It
describes the sequence of energy from one population to the next. In food chain different organisms
of an ecosystem are linked together by their nutritional requirements.
The figure shows the different types of food chains found in nature.
Quarternary consumers
or
consumers
HE
Top consumers
Tertiary
Eagle
consumers
Crane
Snake
Secondary
Large fish
Primary
Lion
Frog
consumers
Small fish
Elephant
Deer
Grasshopper
Aquatic
Green plant
plants
Green grass
A
B
С
(i) The type of food chain marked as A in the figure is
(a) aquatic
(b) forest (c) grassland
(d) desert
(ii) Which of the food chain in the above figure is a figure step food chain?
(a) A
(6) B
(c) C
(d) None of these
(iii) The three main trophic levels on which the food chains A based are
(a) herbivore, producer, carnivore (6) carnivore producer, herbivore
(c) carnivore, herbivore, producer (d) producer herbivore, carnivore
(iv) The type of food chain given in C is
(a) aquatic
(6) grassland
(c) desert
(d) forest
(v) The snake in the type of food chain C is
(a) Primary consumer
(b) Secondary consumer
(C) Tertiary consumer
(d) top consumer
18. Read the following and answer any four questions from 18 to 18