A. aves
B. chordata
C. passeriforms
D. animalia
Ecology
Ecology
A. 76000km2
B. 7600km2
C. 7000 km2
D. 80km2
A. 40%
B. 20%
C. 10%
D. 60%
A. genetic diversity
B. species
C. ancesstors
D. community
A. biodiversity
B. community
C. population growth
D. species
A. black
B. yellow
C. blue
D. colorless
A. sulfur dioxide
B. nitrogen oxide
C. oxygen
D. a and b both
A. reforestation
B. deforestation
C. succession
D. primary succession
A. refrigerator
B. air
C. fossils
D. atmosphere
A. acid deposition
B. rain
C. cloud
D. storm
