Answer: Rainforests have an abundance of plants and animals for the following reasons: Climate: because rainforests are located in tropical regions, they receive a lot of sunlight. ... Canopy: the canopy structure of the rainforest provides an abundance of places for plants to grow and animals to live.
Explanation:
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The answer is to add a 0 hours control.
In every experiment, the control group is necessary. That way, effects of all variables except the independent one will be minimized. The<span> independent variable is variable that is not affected in the experiment. In this example, the amount of light. The dependent variable is called dependent because it depends on the independent variables. In this example, the dependent variable is the average volume of oxygen (photosynthesis).
But to minimize effects on variables, it is necessary to include the 0 hours group, so it can be compared to the other groups. </span>
