. Which statement best expresses the central idea in the article? A. Scientists have discovered a way to prevent genetic defects in babies, but some believe genetic development should be left to nature
B. Scientists have discovered a way to prevent genetic defects in babies, but some worry that the process could be used for great economic gain
C. Scientists have discovered a way to prevent genetic defects in babies, but the method is against many families’ religions
D. Scientists have discovered a way to prevent genetic defects in babies, but the process is still very risky

What do lava flows made of aa indicate about the type of volcanic eruption that occurred? a. the eruption was viscous. b. the eruption was pyroclastic. c. the eruption was explosive. d. the eruption was quite. !

When you run, you begin to breathe heavier and faster. your heart beats more quickly, bringing more oxygen to your cells. which organ systems are working together here?

Agroup of students is studying convection currents. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other in an area with warm air. after 10 minutes, the balloons are released from a height of 1 meter. which of the following do the students most likely observe? question 8 options: the cold balloon expands and rises. the warm balloon shrinks and sinks. the balloons rise at the same rate. both balloons are the same size. the ballons both rise. the cold ballon is larger than the warm balloon. the warm balloon expands and rises. the cold balloon shrinks and sinks.