A. Nitrogen

B. Carbon dioxide

C. Carbon monoxide

D. Oxygen

A. Drilling

B. Reaming

C. Boring

D. All of these

A. Carburizing

B. Boronizing

C. Induction hardening

D. All of these

A. Ductility

B. Conductivity

C. Strength

D. None of these

A. 1535 kJ/kg

B. 1895 kJ/kg

C. 2257 kJ/kg

D. 2690 kJ/kg

A. Clot 

B. Flow through the wings 

C. Contain antibodies 

D. Transport hormones

A. Fruit fly 

B. Plant-hoppers

C. Plant bug

D. Leaf cheaper 

A. Tagmosis

B. Segmentation

C. Merogenesis

D. None of these.

A. Prothoracic leg

B. Mesothoracic leg

C. Metathoracic leg

D. Union of thorax and abdomen

A. Adult males

B. Immature males

C. Adult females

D. Immature females