Question : Which of the following is true for photoperiodism?

Option 1: It occurs only in plants.

Option 2: It is related to flowering in plants.

Option 3: It is related to the feathers of animals.

Option 4: It is the reaction of organisms to the length of day or night.

Question : Which of the following events in 1976 was an outcome of the "Simla Agreement" between India and Pakistan?

Option 1: End of the Indo-Pak war over Kashmir.

Option 2: Halt in production of nuclear weapon.

Option 3: Aries wars condition in both the countries.

Option 4: Aries conflicts in trade and mutual benefits between both the countries.

Question : A closed economy is one in which

Option 1: Does not trade with other countries

Option 2: Does not possess any means of international transport

Option 3: Does not have a coastal line

Option 4: Is not a member of the UNO

Question : The kidney-shaped guard cells are present in which of the following?

Option 1: Dicot plants

Option 2: Monocot plants

Option 3: Both of the above

Option 4: Algae

Question : The amount of oxygen in the atmosphere remains relatively constant because it is given off by

Option 1: oceans

Option 2: animals

Option 3: rocks

Option 4: plants