Natural ecosystem
A biological environment occurring freely in nature rather than being created by man is called as a natural ecosystem.
Example : Desert, forest
1. Which one of the following is a natural ecosystem
a. Pond
b. Forest
c. Lake
d. All of these
2. The _________ ecosystem can be seen existing in the artics as well as the tropics.
a. desert
b. marine
c. grassland
d. forest
3. The _______ ecosystem refers to the aquatic ecosystem containing saltwater and harbours a range of species
a. desert
b. marine
c. grassland
d. forest
4. The _______ ecosystem are found in steppes, savannas, and prairies, in the tropical and temperate regions
a. desert
b. marine
c. grassland
d. forest
5. The _______ ecosystem is classified on the basis of the climate which can either be tropical, temperate or boreal.
a. desert
b. marine
c. grassland
d. forest
