BREATHING and EXCHANGE OF GASES(NCERT)
286040
Which one of the following statement is correct?
1 Amphibians like frogs can respire through their moist skin.
2 In all animals only oxygen is transported by blood.
3 All animals and plants need oxygen for respiration.
4 All of the above
Explanation:
(a) Amphibians such as frogs can respire through their most skin. This type of respiration is known as cutaneous respiration.