Which animal adaptation happened before the others?
O A. Lungs
O B. Backbone and skull
O C. Reproduction on land
O D. Development of a coelom

Most scientific questions are based on opinions. hypotheses. observations. experimental data.

If animal agriculture was eliminated, how much grain would become available for human consumption?

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