Oxygenated blood to heart is supplied by:

1. Hepatic artery
2. Coronary artery
3. Renal artery
4. Pulmonary artery

Assertion (A): There is frequent urination in summer than in winter.

Reason (R): In summer we lose a lot of water as sweat, so the kidneys reabsorb more water. Hence, urine formed is less in summer than in winter.

1. Both A and R are True
2. Both A and R are False
3. A is True and R is False
4. A is False and R is True

Hari is fond of watching the fish in an aquarium. So, he set up an aquarium in his house. Along with a number of fresh water fish, he also placed a clown fish which is a salt water fish. After few hours, the clown fish was found dead and floating on water. This was due to:

1. Endosmosis
2. Exosmosis
3. Osmoregulation
4. Excretion

The solvent used for dissolving chlorophyll while testing a leaf for starch is:

1. Sodium hydroxide
2. Lime water
3. Water
4. Ethyl alcohol