A control group in a scientific experiment is a group separated from the rest of the experiment, where the independent variable being tested cannot influence the results. This isolates the independent variable's effects on the experiment and can help rule out alternative explanations of the experimental results.
No, there are unicellular organisms or single-celled organisms which have one cell...
Please mark as brainliest...
I believe the answer is B. they respond to stimulli
Answer:
In the second picture, the answer is A to attach to a host cell.
In the third, the fourth and the fifth the answer is D.
Explanation:
1. Cyclic
2. Linear
3. Angular
I hope this helps
