Answer:
<em>The correct option is A) cadmium dosage</em>
Explanation:
In an experiment, an independent variable can be described as a factor which is changed naturally or by us to see its effect on the dependent variable. The dependent variable is the variable which is under study and depends on the independent variable.
In the following experiment, we are checking the effect of different dosages of cadmium on the surviving ability of tadpoles. Hence, cadmium dosage is the independent variable. Tadpole population is the dependent variable.
Angiosperms are flowering plants, so I'd say flowers and the parts of flowers are a pretty common characteristic.
Option c I hope it helps:) this came for me too
The answer is D. An irritant that because embedded in the mantle
