Qno.1 Photosynthesis decreases concentration of carbon dioxide in air and other harmful wastes this increases purification of respiratory decrease for

A: Only plants

B: Only animals

C: Living beings (Ans) 

D: None of them

Qno. 2  Chloroplast splits water molecules to release oxygen and add hydrogen to carbon atoms for formation of ?

A: Water

B: Glucose

C: Starch 

D: Sugar (Ans) 

Qno. 3  Guard cells  flanking stomata control oxygen and carbon dioxide entering leaf by opening and closing

A: Palisade

B: veins

C: stoma

D: Leaf pores (Ans) 

Qno.4 Rate of photosynthesis decrease  because enzymes are denatured at

A: Zero temperature

B: Lower  temperature

C: Higher temperature (Ans)

D: None of them

Qno. 5  Tissues present in leaf, under upper epidermis and above lower epidermis are known as

A: Stoma

B: Stalk

C: Vein

D: Mesophyll(Ans)

Qno.6 For most plants, rate of photosynthesis does not increase at 

A: lower temperature

B: Constant temperature

C: Higher temperature (Ans) 

D: Doesn’t matter temperature

Qno.7 Waste products of process of respiration are

A:  Food+Oxygen

B: Carbon dioxide and water( Ans) 

C: Oxygen and Co2

D:None of them

Qno.8  Process of photosynthesis takes place in the

A: Glucose and oxygen 

B: Starch and sucrose

C:  System

D: Chloroplast (Ans) 

Qno.9 Light is absorbed by some substances, these substances are known as

A: Vein

B: Sugar

C: Surface

D: Pigment (Ans)