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Home Q & A Board Biology-Related Homework Help General Biology
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skyleton skyleton
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6 years ago
Male mallards have had emerald green head
  feathers and wings with metallic blue patches
  for hundreds of years, whereas female mallards
  have been drab, brown-feathered ducks. This
  phenotypic situation suggests that mallards
  may be an example of
  a. directional selection.
  b. polyploidy.
  c. allopatric speciation.
  d. disruptive selection.
  e. sexual selection.

Question 2

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
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butterflybutterfly
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6 years ago
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skyleton Author
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6 years ago
Correct Slight Smile TY
mambah4
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Yesterday
Thanks
Mcb
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2 hours ago
Helped a lot
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