What is the percentage of water on an average that a living organism have?

Q. An organism X having breathing organs A lives on land. When organism X goes under water, it cannot survive for a long time unless carrying an oxygen cylinder. On the other hand, the​ organism Y having breathing organs B always lives in water and if taken out of water, it dies after a short while. A third organism Z having breathing organs C and D which lives on the banks of ponds, lakes and rivers can survive on land as well as in water equally well.​ ​

(a) What could organism X be? Name the breathing organs A.​

Organism	Habitat
X	Land
Y	Water
Z	Land and water

Q. What are the following organisms called?
a) Algae that prepare their own food.
b) Fungi that either depend on living organisms or non-living things for their food.
c) An organism having both algal and fungal characters.

Q. An organism X having breathing organs A lives on land. When organism X goes under water, it cannot survive for a long time unless carrying an oxygen cylinder. On the other hand, the organism Y having breathing organs B always lives in water and if taken out of water, it dies after a short while. A third organism Z having breathing organs C and D which lives on the banks of ponds, lakes and rivers can survive on land as well as in water equally well.
(a) What could organism X be? Name the breathing organs A.
(b) What could organism Y be? Name the breathing organs B.
(c) What could organism Z be? Name the breathing organs C and D.
(d) Out of X, Y and Z, which organism is (i) amphibian, (ii) aquatic, and (iii) terrestrial?

Q.

Bacteria are the smallest living organisms on earth, with an average of ___ micrometres long and___ micrometre thick.

Q. In an average soil, the percentage of organic matter is about