Question

1. a scientist who wants to study the effects of fertilizer on plants sets up an experiment. plant a gets no fertilizer, plant b gets 5 mg. of fertilizer each day, and plant c gets 10mg. of fertilizer each day. which plant is the control group. a) plant b b) all of them c) plant c d) plant a

Explanation:

在实验中，对照组（control group）是不接受实验处理（在此实验中即不接受肥料处理）的组，用于和实验组对比。题目中植物A不接受肥料，所以是对照组。

Answer:

D. Plant A