Spraying of DDT on crops causes pollution of

• Air and Soil

• Crops and Air

• Soil and Water

• Soil and Water

Which cells in pancreas produce insulin?

• Thymus

• Estrogen

• Corpus epididymis

• Corpus epididymis

The hormone that stimulates heart beat is

• Thyroxine

• Gastrin

• Glycogen

• Glycogen

Which one of the following events in a botanical garden is never directly influenced by light?

• Flowering

• Photosynthesis

• Transpiration

• Transpiration

The waste management technique that involves the use of micro-organisms to remove or neutralize pollutants from contaminated site is called

• Bio sensor

• Bio magnification

• Bio remediation

• Bio remediation

Which of the following is a fish?

• Jelly fish

• Lobster

• Salmon

• Salmon

At which stage in its life cycle does the silkworm yield the fiber of commercial use

• Larva

• Egg

• Pupa

• Pupa

Blood is red in colour due to the presence of .............

• cytochrome

• chlorophyll

• hemocyanin

• hemocyanin

The study of relation of animals and plants to their surroundings is called

• Ecology

• Ethnology

• Genealogy

• Genealogy

The oxygen liberated during photosynthesis comes from

• Water

• Carbon dioxide

• Glucose

• Glucose