Which of the following statements is correct about the respiration in frog ?
(i) In frog, cutaneous and pulmonary respiration are found
(ii) A pair of elongated pink hollow lungs are found in thorax
During aestivation and hibernation, gaseous exchange takes place through skin.

During aestivation and hibernation in frog, gaseous exchange takes place through

Consider the following statements about respiratory system of frog. I. Skin acts a respiratory organ in water only. II. Dissolved oxygen is exchanged through the skin by the process of diffusion in water. III. Lungs are paired and present in thorax. IV. Gaseous exchange take place through the skin during hibernation and aestivation. Which of the statement (s) given above is/are incorrect ?

Which of the following statements is/are incorrect about columnar epithelium? (i) It is made of tall and slender cells. (ii) Free surface may have microvilli. (iii) They are found in stomach and intestine and help in secretion and absorption. (iv) Ciliated epithelium is mainly present in hollow structures like bronchioles and Fallopian tubes. (v) They have apical nuclei.

Which of the following statements are true about amphibians? a. they are cold-blooded b. Respiration occurs through gills, skin and lungs. c. they are poikilotherms d. Respiration occurs only through gills and skin.

Which of the following statements are true about amphibians? a. they are cold-blooded b. Respiration occurs through gills, skin and lungs. c. they are poikilotherms d. Respiration occurs only through gills and skin.

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 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