What is mechanical energy ? What are its two types ?

What mechanical energy means ?

(a) What is mechanical energy ? (b) What is electromagnetic energy ?

What is Mortality? What are its two types?

(a) What is mechanical energy ? (b) What kind of energy changes take place in the bodies of living beings, so as to produce mechanical energy.

What is reproduction? What are its two types? Which one of the two confers new characteristics on the offsprings and how?

What is respiration ? What are its two types?

What is vaccine ? What are its types ?

What is sclerenchyma? What are its types?