It is the Iris I believe. It controls the diameter and size of the pupil, controlling the amount of light reaching the retina.
Answer:
a) withheld information from test subjects about their condition
Explanation:
The Tuskegee syphilis study which was carried between 1932-1972 in the Macon County, Alabama on the African-Americans infected from syphilis.
The U.S. Public Health Service started the study promising the infected persons that they will receive the benefits from the studies like a healthy meal, proper antibiotic medication and other benefits.
But the U.S Public Health Service failed to provide the services mainly the medication in which antibiotic penicillin which could treat the disease was not provided to the patient. As a result of this, syphilis continued in their generations also and people and about 100 subjects died.
They were told that they had bad blood which cannot be treated and thus in 1972, this raised a question over this issue related to ethics as to why the penicillin was not provided as well why the person was kept away from the reality.
Thus, Option-A is the correct answer.
The answer is C. i just completed a worksheet and i got the answer correct hope it helps:)
The answer is A: They produce pollutants that harm people.
Hope this helps
Movable-type printing was the invention in the 1400’s revolutionized the way knowledge could be spread.
<h3>
What is Movable-type printing?</h3>
This type of printing involves the use of movable components to reproduce elements and letters on paper.
This was adopted by churches through printing of bible and other religious materials and led to the protestant reformation in the 1400s
Read more about Printing here brainly.com/question/12336191
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