Question

cadmium dosage & survivorship in bullfrog tadpoles
according to the graph, what abiotic factor influences tadpole survival?
a size of pond
b cadmium dosage
c available food
d number of surviving tadpoles

Explanation:

The graph's title and x-axis label show the independent variable is cadmium dosage, which is an abiotic factor (non-living chemical). The y-axis shows surviving tadpoles (dependent variable). Other options (pond size, food, surviving tadpoles) are not the variable tested in the graph.

Answer:

B. cadmium dosage