Ecology

A. pioneer community
B. primary community
C. climax community
D. succession

A. 15000kcal/m2/yr
B. 1600kcal/m2/yr
C. 1 million
D. 2 million

A. 50%
B. 40%
C. 30%
D. 70%

A. 10%
B. 20%
C. 30%
D. 40%

A. ecological niche
B. ecology
C. ecosystem
D. community

A. autotrophs
B. heterotrophs
C. community
D. species

A. endotherm
B. ectotherm
C. species
D. community

A. geological cycle
B. hydrological cycle
C. carbon cycle
D. mineral cycle

A. upper part
B. outer layer
C. skeleton
D. muscles

A. fossile fuel burning
B. agriculture
C. population growth
D. deforestaion