When consumers break down food, they release as waste products.

a. carbon dioxide and water
b. water and oxygen
c. nitrogen and hydrogen
d. hydrogen and carbon dioxide

What are tissues? a groups of tissues that work together b basic units of structure and function c groups of cells that perform the same function d multiple organs that perform a major function

Which gas found in the earth's atmosphere greatly impacts the daily range of temperature on earth. a) oxygen b) hydrogen c) nitrogen d) water vapor

Which of the following particles always has a positive charge? a. electronb. neutron c. proton d. ion