Answer:
Iris
Explanation:
The iris opens and closes to control the amount of light entering through the pupil (schepens.harvard.edu).
Answer: Longitudinal Research
Explanation:
This type of design involves studying the same kind of people over an long period of time. Data is collected at the beginning of the study and gathered repeatedly through the course of study. In some cases, longitudinal studies can last for several decades or be open-ended.
Shelters should be accessible to all animals, have sufficient ventilation, and be of the Guide to discuss the housing requirements of all species used in research. If they are housed individually or exceed the weights in the table, animals. Loafing areas, exercise lots, and pastures are suitable for large farm animals.
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The cardiovascular system is your heart and blood vessels. If it stopped working, that would affect your whole body
