Rabbits,
pabulus, rats, grasshoppers and grasses are……..
a) community
b) niche
c) biome
d) population
The ecological factor which does not change from place to place is……..
a) precipitation
b) gravity
c) light
d) temperature
Which of the following is marine alga?
a) nostoc
b) Ulva
c) volvox
d) spirogyra
Explanation: This is a small genus of marine and brackish water green algae. It is edible and is often called 'Sea Lettuce'.
How many elements are critical to the life of organisms?
a) two
b) three
c) four
d) six
Explanation: hydrogen, oxygen, carbon, nitrogen, calcium and phosphorus
The water cycle is called…..
a) hydraulic cycle
b) hydrologic cycle
c) hydration
d) evaporation
Percentage
of fresh water on planet Earth is…
a) 97%
b) 3%
c) 1%
d) 0.02%
