This graph shows both human birth weight and
newborn infant mortality. The most common birth
weight is between seven and eight pounds. Human
birth weight seems to be an example of
a. directional selection.
b. stabilizing selection.
c. sexual selection.
d. disruptive selection.
e. artificial selection.
Answer: b
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Our species, H. sapiens, derived from:
A. H. neanderthalensis. B. H. floriensis. C. H. ergaster/H. erectus. D. H. habilis. E. H. rudolfensis.
The collecting duct of the nephron originates in what region of the kidney and extends to what region of the kidney?
A. renal medulla to the renal pelvis B. renal medulla to the renal cortex C. renal pelvis to the renal medulla D. renal cortex to the renal medulla E. renal cortex to the renal pelvis
Which of the following hormones is made by the hypothalamus and released by the posterior pituitary?
A) estrogen B) growth hormone C) ADH D) insulin
Retroviruses are characterized by ____.
A. RNA that is used as a template to produce DNA in a host cell B. integrating RNA into the host’s chromosome C. the enzyme alkaline phosphatase D. having one strain that causes H1N1 E. the lack of a protein coat