wool is produced by.
Parrot
Peacock
Sheep
Silk worm
Name one non-biodegradable waste which may pollute the earth to dangerous levels of toxicity, if not handled properly.
DDT
CFC
Radioactive substances
PAN
Fertility of the soil is increased by
Earth worms
Rat
Snake
Snail
ultimate source of energy is
Water
Sun
Cloud
Moon
plant eating animals are called
Herbivores
Carnivores
Omnivores
Decomposers
Biotic environment includes
producers
consumers
decomposers
all the above
Which one is good example of scavengers?
Lion
Tiger
Prawns
The concentration of which gas is highest in our environment?
Oxygen
Hydrogen
Nitrogen
Carbon dioxide
71% of earth surface is covered with:
land
air
water
coal
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
