7. Though the wastes are pumped into porous rock, the industry claims the wells are
safe because
A subsurface heat purifies the waste
B they are beneath aquifers
C they are lined with steel
D their wastes are solid

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

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

Color blindedness is a sex-linked trait. if we could see the pedigree chart for several more generations of the family illustrated here, we would expect a) more males to be color blind. eliminate b) more females to be color blind. c) no females to ever be color blind. d) an equal number of males and females that are color blind.