In which African ecosystem would you most likely find giraffes, zebras, and lions in a grassland habitat?

Firms use marginal analysis to determine prices by a) changing prices in accordance with information from retailers. b) using comparisons with strong competitors to position prices accordingly. c) examining the effect on revenue of small changes to the price of one item. d) trying to minimize production costs by using better and more efficient methods.

When the blood leaves the atria (upper chambers) where does it flow to? a. aorta b. lungs c. ventricles d. rest of the body

The double-blind procedure is most for a.random assignment b.the placebo effect c.operational definitions replication d. standard deviations