A control group is a group that does studies or Experiments that does not receive treatment by researchers and is then used as a benchmark to measure how the other tested subjects do. Ex: Experimenting Arizonas and water together.
The right option is a. flea is
more active in a dry environment
Kinesis is an activity or physical
movement of a living cell or an organism in response to a stimulus such as
light intensity or humidity. Under kinesis, the response to the stimulus activated
by an organism is non-directional.
Over long periods of time, living things have gradually altered as the conditions around them change. A species' strongest traits are passed from one generation to the next. This is what evolution is, the process of gradual change.
Species A’s population will decrease due to limited space. <em>(I think. I'm sorry if I'm wrong.)</em>
Explanation:
respiration because it's about blood circulation
