List the five types of pathogens that are responsible for the spread of infectious disease.

How does photosynthesis show the conservation of mass and energy?

Which statement describes characteristics of planarians? a they live in oceans, are parasites, and reproduce only sexually. b they live in fresh water, are parasites, and reproduce only asexually. c they live in oceans, are free living, and reproduce sexually and asexually. d they live in fresh water, are free living, and reproduce sexually and asexually.

Chloroplasts and bacteria are in size. a. similar b. at different ends of the size range c. exactly the same d. none of these