An evolutionary and ecological perspective

A. water
B. hormones
C. air
D. movement

A. 250-300
B. 300-200
C. 300-400
D. 500

A. population
B. variation
C. community
D. zoo

A. grassland
B. zoo
C. botanical garden
D. green area

A. observation
B. hypothesis
C. genome
D. experiment

A. 1996
B. 1998
C. 2000
D. 2001

A. heavy rain
B. pollution
C. habitats destruction
D. waste accumulation

A. wildlife
B. ancestors
C. forest
D. river flowing

A. ecology
B. physiology
C. zoology
D. wildlife

A. disease
B. rain
C. deforstation
D. ecological disaster