Question

Choose the correct set.

	Column I		Column II
I.	Gross primary productivity	A.	Total assimilation
II.	Secondary productivity	B.	Remains mobile and does not remain in situ
III.	Transducers	C.	Green plants
IV.	Food web	D.	Interlocking pattern

• A. I- A, II- B, III- C, IV- D
• B. I- B, II- C. Ill- D, IV- A
• C. I- C, II- D, III- A, IV- B
• D. I- A, II- C, Ill- B, IV- D

Answer 1

The correct option is A I- A, II- B, III- C, IV- D

Primary productivity is the rate at which energy is converted by photosynthetic and chemosynthetic autotrophs to organic substances.

The total amount of productivity in a region or system is gross primary productivity.

A certain amount of organic material is used to sustain the life of producers; what remains is net productivity.

The transducer is a device, which transforms one type of energy to another. Plants are the natural transducers. They convert the supreme source of energy, that is sunlight into ATP form which is then transferred to carnivorous and other strata of animals in the food chain and food web consequently.