Which part of alimentary canal receives bile from the liver?

A few drops of iodine solution were added to rice water. The solution turned blue-black. This indicates that rice water contains

Which of the following statement(s) is (are) true about respiration?

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

(ii) In the alveoli, exchange of gases takes place i.e., oxygen from alveolar air diffuses into blood and carbon dioxide from the blood into the alveolar air.

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

(iv) Alveoli increases surface area for exchange of gases.