Flow of energy in an ecosystem is always

Excessive exposure of humans to UV-rays results in

(i) damage to the immune system

(ii) damage to lungs

(iii) skin cancer

(iv) peptic ulcers

(i) Wood, paper, leather 

(iii) Plastic, detergent, grass

Which group of organisms are not constituents of a food chain?

(i) Grass, lion, rabbit, wolf

(ii) Plankton, man, fish, grasshopper

(iii) Wolf, grass, snake, tiger 

(iv) Frog, snake, eagle, grass, grasshopper

In the given figure, the various trophic levels are shown in a pyramid. At which trophic level is maximum energy available?

What will happen if deer is missing in the food chain given below?

Grass $\to$ Deer $\to$ Tiger