Explain how the potential for specialization varies with cell type and how it varies over the life span of an organism.

Explain the importance of producers, primary consumers, secondary consumers and decomposers in an ecosystem.

Which of the following are false concerning microbes? a. microbes generate oxygen through photosynthesis.b. the primary role of microbes on the planet involves causing disease in animals and humans.c. microbes produce vitamins in the intestines.d. microbes play a role in breaking down waste and decomposing dead organisms.

Which of the following produces carbon dioxide? a. plants b. animals c. decomposers d. all of the above