Topics: How the Eyes work Quiz
It controls the amount of light that enters the pupil.
A. iris
B. retina
C. eyebrow
Select your answer:

Topics:
Sports Medicine Cardiovascular Physiology - Function Enzymes and Movement of Substances The Circulatory System Illness and Symptoms Life Processes Excretion Microbes Biomedical Biodiversity Eye Physiology Human Physiology Food and Health & Bones and Muscles Mental Health Cardiovascular Med Terms Nature of ScienceOther quiz:
Injury › ViewThis injury is also known as…a cut
A. Abrasion
B. Puncture
C. Laceration
D. Avulsion
DNA › View
Sickle cell anemia is a disease in which red blood cells become irregularly shaped. The disease is caused by the presence of an incorrect amino acid in a certain protein. The disease most likely occurred due to an altered sequence of nitrogenous bases in the –
A. original DNA in the nucleus.
B. transcribed mRNA strand.
C. tRNA on the ribosome.
D. complementary DNA strands.