As the trees in England become less sooty due to pollution controls on factories, which of the moths in the
accompanying figure will be selected against?
a. The dark moth on the dark tree
b. The light moth on the light tree
c. All of the light moths equally
d. The dark moth on the light tree
e. All of the dark moths equally
ANSWER: d
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Growth in ocean areas that are high nutrient and low chlorophyll (HNLC) is limited by the availability of ________.
A. iron B. manganese C. phosphorus D. nitrogen
It is believed that the two main reasons for mass extinctions in Earth's history have been
A. collision between Earth and a large celestial body and human intervention. B. global warming and human intervention. C. human intervention and shifting of Earth's continents. D. global warming and shifting of Earth's continents. E. collision between Earth and a large celestial body and shifting of Earth's continents.
What is selective breeding?
What will be an ideal response?
The rigid chitinous exoskeleton of an arthropod has all of the following functions except it
A. prevents injury to the animal. B. impedes water loss. C. provides a place for muscle attachment. D. maintains a uniform size for all individuals of that species. E. protects the animal from predators.