Question : The broad, green part of the leaf is called _____.

Option 1: lamina

Option 2: petiole

Option 3: veins

Option 4: midrib

Question : What is the thick vein present in the middle of the leaf called?

Option 1: Midrib Venation

Option 2: Leaf venation

Option 3: Reticulate venation

Option 4: Parallel venation

Question : Surface water is a better source of drinking water because it is poor in

Option 1: Dust

Option 2: Bacteria

Option 3: Arsenic

Option 4: Algae

Question : The streams of water flowing constantly on the ocean surface in definite directions are called _________.

Option 1: waves

Option 2: cyclones

Option 3: tides

Option 4: ocean currents

Question : An oil drop spreads over water because:

Option 1: oil is lighter than water.

Option 2: oil is more viscous.

Option 3: oil does not mix with water.

Option 4: surface tension of oils is much smaller than that of water.