The adjustable ring of contractile and connective
tissues that controls the amount of light entering the
eye is the
a. lens.
b. cornea.
c. pupil.
d. iris.
e. retina.
Answer: d
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Which of the following is the most spontaneous reaction? A reaction that is _____
A) slightly exothermic and leads to a slight increase in entropy B) slightly endothermic and leads to a huge decrease in entropy C) highly exothermic and leads to a huge decrease in entropy D) slightly exothermic and leads to a huge increase in entropy
In humans, birth weight is an example of a characteristic affected by stabilizing selection. What does this mean to the long-term average birth weight of human babies? How might the increasing number of Caesarean sections be affecting this characteristic?
What will be an ideal response?
True or False: If all other aspects of their lifestyles were equivalent, a vegetarian would have a smaller ecological footprint than someone who consumes a large amount of meat
A. true B. false
Factors that work generically against any foreign substance entering the host are described as
A. innate immunity. B. specific immunity. C. irregular immunity. D. immune metabolism.