Name one animal which gets oxygen for breathing and respiration through tiny holes (spiracles) in its body which are connected to a network of thin air-tubes (tracheae).

Name an animal which absorbs oxygen through its moist skin

Name an animal in which exchange of gases during breathing takes place through its thin and moist skin. ?

Name one animal which can breathe throught lungs as well as skin

Name two animals which breathe through gills

Which one of the following animals breathes through the skin ?

A, B and C are three living organisms. The organism A is a unicellullar fungus which can live without air. It is used in the commercial production of an organic compound P from molasses. The organism B is a unicellular animal which lives in water and feeds and moves by using pseudopodia. It breathes through an organelle Q. The organism C is an tiny animal which acts as a carrier of malarial parasite. It breathes and respires through a kind of tiny holes R and air-tubes S in its body. (a) What are organisms (i) A (ii) B, and (iii) C ? (b) Name (i) P (ii) Q (iii) R, and (iv) S (c) Which organism/organisms undergo aerobic respiration ? (d) Which organism/organisms undergo anaerobic respiration ?

What are spiracles? Name one animal in which they are present.

Dihydrogen reacts with dioxygen (O_(2)) to from water .Write the name and formule of the product when the isotope of hydrogen which has one proton and one neutron in its nucles is treated with oxygen. Will the reactivity of both the isotopes be the same towards oxygen ? Justify your answer.

Which group of animals have spiracles and tracheae for breathing and respiration ?