Macula is the part of the eye that focuses image
Answer: you might see little block-like structures if you look at any type of cell, if it is a plant cell you were looking at, you would be able to see the cell wall.
Answer:
between-subjects design
Explanation:
According to my research on different experimental designs, I can say that based on the information provided within the question the best way to make sure that the internal validity will not be influenced by an outside event is to switch to a between-subjects design. This type of design is an experiment design that has two or more groups of subjects each being tested by a different testing factor simultaneously. Since they are done simultaneously it significantly reduces outside influence.
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Lung cancer, respitory problems, digestive problems, and other cancers.
