What multicellular forms of life evolved from the early single-celled organisms

Which statement best describes the relationship between observations and conclusions? a) observations are based on conclusions b) conclusions are based on observations c) observations and conclusions both depend on research d) neither conclusions nor observations depend on research.

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

15 ! come and answer! a(n) is the general term for an infectious disease that has spread across a city, region, or country.