What does the immune system protect the body against?

What are two reasons for why a species might disappear from the fossil record?

In which state was more than 100 billion tons of coal mined in 2005?

What would most likely happen if green plants were exposed to longer days of sunlight? a. the mitochondria would produce less energy . b. the chloroplasts would produce more energy. c. the cell wall would become thicker. d. the vacuoles would quickly shrink.b. the chloroplasts would produce more energy.