The two organisms which breathe only through their moist skin are :

Which of the following statements are true about respiration?

(i) during inhalation, ribs move inward and diaphragm is raised.

(ii) the. gaseous exchange takes place in the alveoli.

(iii) haemoglobin has greater affinity for carbon dioxide than oxygen.

(iv) alveoli increase surface area for the exchange of gases

Which of the following is known as the energy currency of cells in biology ?

One of the following animals does not use tracheae as the respiratory organs. This animal is:

The photosynthesis in a plant is not taking place during the day time if the plant is releasing: