Which reason best explains why living things need carbon? a. carbon is a source of energy. b. carbon reduces global temperatures. c. carbon is an important solvent. d. carbon is everywhere.

Compare and contrast nutrient limitation in soil vs. nutrient limitation in aquatic ecosystems

In addition to seeds, which of the following characteristics are unique to the seed-producing plants? a) sporopollenin b) lignin present in cell walls c) pollen d) use of air currents as a dispersal agent e) megaphylls

Sweating and breathing is an example of differentiation specialization maintaining homeostasis metabolism