Which component of waste is filled in the land fills ?

In which group of animals, coelom is filled with blood ?

In which group of animals, coelom is filled with blood?

Which of the following gases is filled in balloon?

Which gas is filled in element bulbs/tubes?

A cistern has two taps which fill it in 12 minutes and 15 mintues respectively . There is also a waste pipe in the cistern. When all the pipes are opened , the empty cistern is filled in 20 mintues. How long will the waste pipe take to empty a full cistern ?

Which of the following part in ear is filled with endolymph ?

Which of the following structure is not filled with endolymph ?