The hormone used as an oral contraceptive is

• testosterone

• aldesterone

• cortisone

• progesterone

Transboundary pollution (or) Acid rain is caused by

• hydrocarbon

• nitrogen oxide and sulphur dioxide

• carbon monoxide

• carbon dioxide

In dicots, the pollen grain possess

• four germ pores

• one germ pore

• two germ pores

• three germ pores

264.

Blood group was discovered by

• Pavlov

• Alexander Fleming

• William Harvey

• Landsteiner

The 'One Straw Revolution' was written by

• Norman Borlaug

• Masanobu Fukuoka

• Richael Carlson

• MS Swaminathan

Haemolymph is observed in

• Arthropods

• Echinoderms

• Ascaris

• Annelids

The immunity caused by the B-lymphocytes is called

• Sterile immunity

• Acquired Immunity

• Cellular Immunity

• Humoral Immunity

Pink mould is the common name for

• Aspergillus

• Rhizopus

• Neurospora

• Mucor

The sleeping sickness is caused by

• Escherichia

• Neisseria

• Entamoeba

• Trypanosoma

Flow of blood in dorsal blood vessel of earthworm is

• sideward

• downward

• backward

• forward