Which of the following affect/s the ecosystems on earth?
a) flood
b) drought
c) sunlight
d) both a and b
Which of the following is more disturbing the global water cycle?
a) plants
b) animals
c) cyclones
d) humans
Living organisms are adopted to their…….
a) home
b) habitat
c) environment
d) none
Which of the following are new organisms brought into an ecological environment?
a) old species
b) extinct species
c) introduced species
d) all of these
Introduced species in an environment affects
a) plants
b) animals
c) all existing species
d) fungi
Which of the following is leading cause of species extinction?
a) global warming
b) pollution
c) hunting
d) deforestation
