Apolyethylene molecule is made of ethane a. atoms b. monomers c. polymers d. proteins

In the water cycle , when does water undergo a chemical change

Explain how sequences of amino acids in proteins can be used to reveal relationships among organisms.

Astudent wants to test the hypothesis that fertilizer improves the growth rate of grass seeds. to test this hypothesis, the student put the same amount of grass seed in 3 containers with the same type of soil. the student measured the growth at the end of the week. all plants received equal amounts of water and sunlight. if you were asked to graph this data, what would you place on the x-axis? a. fertilizer b. water c. plant growth d. week one