Question

the table below shows data for a population of fish in a pond. which of the above characteristics would be most helpful in developing a classification system for the fish? a. body color and tail shape b. presence of scales and tail shape c. body color and number of fins d. number of fins and presence of scales

Explanation:

分类系统需要依据有差异的特征。表格中鱼的“number of fins”（鳍的数量）都是4，“Scales”（鳞片）都是“yes”，这两项无差异。而“body color”（身体颜色）和“tail shape”（尾巴形状）有不同表现，可用于分类。

Answer:

A. body color and tail shape