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

Biology & Microbiology

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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

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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?

Biology & Microbiology

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

Biology & Microbiology

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.

Biology & Microbiology