Mr. X is eating curd/yoghurt. For this food intake, in a food chain he is considered as occupying
first trophic level
second trophic level
third trophic level
fourth trophic level
Which of the following is the best method to dispose biological wastes from hospitals?
Landfill
Recycling
Incineration
Composting
Which of the following is not a producer?
grass
zooplankton
phytoplankton
paddy
Which of these is an example of abiotic component?
Soil
Fungi
Green plants
Animals
Which of the following does not affect ozone layer?
Cl2
CH3Cl
NO
CFCl3
The dominant second trophic level, in a lake ecosystem is
benthos
plankton
Primary or first order consumers are also known as
autotrophs
heterotrophs
herbivores
carnivores
Sahara Desert was formed over a period of time due to one of the following uncontrolled activities of man:
a) excessive cutting down of forest plants and trees
excessive killing of large herbivores
excessive killing of large carnivores
excessive use of poisonous chemicals called herbicides
Which of the following cannot be added in a composting pit to prepare compost?
sunflower plants
fruit and vegetable peels
flowers of plastic
red worms
The flow of energy in an ecosystem is always:
unidirectional
linear
cyclic
multidirectional
