In an experiment, a group of scientists want to test the effects of humidity on plant growth. The scientists expose the plants in the study to a range of different humidities to measure plant growth over a specified amount of time. In this experiment. What is the independent variable? Please help me ASAP

A) Plant growth
B) Humidity
С)Fertilizer
D)None of the above

Building glycogen from glucose molecules is an example of what

The graph below compares the rates of reaction of a burning candle and an exploding firework. comparing chemical reactions what can you conclude from the graph? the reaction that causes a firework to explode requires less energy to start, and occurs more rapidly than the reaction that causes a candle to burn. the reaction that causes a firework to explode requires less energy to start, and occurs less rapidly than the reaction that causes a candle to burn. the reaction that causes a firework to explode requires more energy to start, and occurs less rapidly than the reaction that causes a candle to burn. the reaction that causes a firework to explode requires more energy to start, and occurs more rapidly than the reaction that causes a candle to burn. mark this and return

The cluster of developing cells from conception until birth is called an