Bony fishes can stay at a particular depth in water without beating their pectoral and pelvic fins due to the presence of

Bony fishes can stay at any particular depth in water without spending energy due to presence of

A bony fish can stay at particular depth in a sea , without expending energy in swimming is , due to the presence of

Pelvic fins of bony fishes are

Pelvic fins of bony fishes are

Pelvic fins of bony fishes are

Assertion : A bony fish can stay at a particular depth without expending energy is a swimming contrary to the cartilaginous fishes. Reason : In bony fishes, the swim bladder is present which helps in buoyancy.

Assertion : A bony fish can stay at a particular depth without expending energy is a swimming contrary to the cartilaginous fishes. Reason : In bony fishes, the swim bladder is present which helps in buoyancy. (a) If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion. (b) If both Assertion and Reason are true ,but the Reason is not the correct explanation of the Assertion. (c) If Assertion is true, but Reason is false (d) If both Assertion and Reason are false.

Analyze how fish can float in a partciular depth of water and can move in various water level.

Carbon dioxide is an essential component of atmosphere. However, when the concentration of CO_2 increases in the atmosphere, it can lead to global warming through green house effect. Similarly, rain water is an essential source of water. It has pH of 5.6 due to the formation of H^+ ions from the reaction of rain water with CO_2 present in the atmosphere. When pH of the rain water falls below 5.6 due to the presence of acids in the atmosphere, it has very damaging effects. What is PAN?