71% of earth surface is covered with:
land
air
water
coal
If waste materials contaminate the source of drinking water which of the following diseases will spread?
Scurvy
Typhoid
Malaria
Anaemia
Which planet s close to the sun
are too hot to sustain life.
Mercury
Venus
Mars
Both a and b
All plants that contain the green pigment called
Xanthophyll
Erythrocyanin
Chlorophyll
Chloroplast
Which of the following is a prime health risks associated with greater UV radiation through the atmosphere due to depletion of stratospheric ozone?
Damage to digestive system
Increased liver cancer
Neurological disorder
Increased skin cancer
wool is produced by.
Parrot
Peacock
Sheep
Silk worm
Which one of the following is an example of biotic component of environment?
wind
vegetation
temperature
plant eating animals are called
Herbivores
Carnivores
Omnivores
Decomposers
Name the substance whose accumulation in pelicans of Lake Michigan led to the formation of thin shells of their eggs.
CFC
PAN
DDT
PAC
Which one is example for microorganism?
Bacteria
Rat
Earthworm
Rabbit
