Orbiting _ can act as labs where astronauts can live and work.
A. Space Stations
B. Satellites
C. Space Shuttles
D. Landers

How does the study of genetic disorders such as pku biologists understand normal alleles?

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

Which of the following is a period in the paleozoic era? devonian cambrian permian all of the above