The maintenance of a self-sustaining ecosystem requires a A. soil that is acidic
B. constant temperature
C. greater numberof herbivores than producers
D. cycling of materials between organisms and their environment

Match each description to the appropriate biome. tropical savanna desert tropical rain forest taiga tundra has sparse vegetation and very cold temperatures located near the equator and contains trees that form dense canopy layers is very hot and dry, and has plants that need little water has cold winters, heavy snowfall and is dominated by conifers has warm temperatures and is dominated by grasses

What condition is kept close to its set point in osmoregulation? a. body temperature b.platelet count c.blood glucose level d.water balance

What type of pollution does household garbage cause