Why do all babies' eyes have irides that are a slate gray to blue color at birth?
What will be an ideal response?
Their irises lack the brown pigment melanin in the iris. Exposure to light triggers the production of melanin by melanocytes.
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A person with bipolar disorder experiences one or more ________ episodes, a distinct period during which the person has an abnormally elevated mood.
Fill in the blank(s) with the appropriate word(s).
Pregnancy is calculated to last 10 ____________________ months.?
Fill in the blank(s) with correct word
A molecule of ________ produces more than 20 times the warming of a molecule of carbon dioxide and remains in the atmosphere for up to 15 years
A) methane B) phosphorus C) radon D) chlorofluorocarbon
Which statement is true regarding moment arm?
A. For torque to remain constant, more force must be produced when moment arm decreases. B. Changes in moment arm directly affect joint muscle torque. C. Moment arm is largest when the angle of pull on a bone is 90°. D. Both moment arm is largest when the angle of pull on a bone is 90° and changes in moment arm directly affect joint muscle torque. E. All of these answers are correct.