Question

Mrs. Smith's class designed and performed an experiment to test the effects of UV-B radiation on salamander egg hatching success. They placed salamander eggs in the Sun underneath either a UV-B blocking or UV-B transmitting filter. They then determined the number of eggs that hatched in each treatment. The results of their experiment are shown in the graph.

What was the effect of UV-B blocking on hatching success?
A.
There was no effect on hatching success when UV-B was blocked.
B.
Hatching success decreased when UV-B was blocked.
C.
Hatching success increased when UV-B was blocked.
D.
Hatching success increased when UV-B was transmitted.

Answer 1

The effect of UV-B blocking on hatching success was B. Hatching success decreased when UV-B was blocked. This can be seen in the graph, which shows that the eggs placed under the UV-B blocking filter had significantly lower hatching success than the eggs placed under the UV-B transmitting filter.