Gibberellins is an example of____________?

During rest the breathing occurs rhythmically at the frequency of _________ times per minute in human?

___________ respiration is the process by which cell utilized oxygen and produces CO2 ?

Lungs are covered with double layered thin membranous sac called______?

___________ respiration is directly involved in the production of energy, necessary for all living activities?

Lungs are spongy due to the presence of million of______?

Top