Oxpeckers eat parasites off of rhinoceroses, which cleans the rhinoceroses while providing a meal for the oxpeckers. The rhinoceroses also benefit because these birds sound warning calls to alert them of nearby danger. If illegal hunting of oxpeckers increases in 2012 and causes a decrease in oxpecker numbers, what will most likely happen to rhinoceros populations?
A.
Rhinoceros populations will remain constant.
B.
Rhinoceros populations will increase.
C.
Rhinoceros populations will decline.
D.
Rhinoceros populations will go extinct.

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.