Fill in the blanks :

(a) Lichens are the good example of …………… association.

(b) Two intermediate hosts of liver fluke are …………… and …………… .

(c) Evergreen trees are common flora of …………… forests.

(d) …………… will always be trophic level-1 in a food chain.

(e) …………… sanctuary is found in West Bengal which is famous for rhinoceros.

Mention if the following statements are true (T) or false (F):

(a) Snakes are primary consumers.

(b) Some humans are strictly primary consumers while others are secondary or tertiary consumers as well.

(c) No ecosystem can survive without light.

Rewrite the following in their correct sequence in a food chain:

(a) Snake → Grasshopper → Grass → Frog

(b) Grass → Tiger → Deer

(c) Snake → Peacock → Rat → Wheat

(d) Lizard → Grass → Crow →Grasshopper

(e) Goat → Man → Maize

Choose the odd one out and write the category of the remaining terms :

(a) Bacteria, Fungi, Vulture, Protists

(b) Air, Water, Plants, Temperature

(c) Rice, Grass, Grasshopper, Maize

(d) Deer, Rabbits, Tigers, Rats

(e) Plasmodium, Tiger, Liver fluke, Tapeworm