Accommodation involves the ability to
a. change the sensitivity of the rods and cones by
means of neurotransmitters.
b. change the curvature of the cornea.
c. change the thickness of the lens by contracting
or relaxing certain muscles.
d. adapt to large changes in light intensity.
e. do all of these.
Answer: c
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All are true about a dehydration reaction EXCEPT which of the following?
A. Results in removal of a water molecule. B. Essential for the breakdown of complex molecules to simple ones. C. Essential to the formation of polymers. D. Essential for the formation of glycogen from glucose monomers. E. Essential for the formation of triglycerides (fat) from glycerol and fatty acids.
To reduce the extent of this damaging phenomenon, many power plants have been required to install systems to remove and capture sulfur dioxide from their emissions
A) acid rain B) eutrophication C) deforestation D) thermal inversion E) ozone depletion
Select all accurate statements regarding introduced and invasive species.
A. A semelparous introduced species is less likely to become invasive than an iteroparous introduced species. B. Most populations of invasive species will be brought under control by natural enemies. C. Introduced species are brought to a new area purposefully, while invasive species arrive accidentally. D. Most introduced species will eventually become invasive species. E. Invasive species are often better competitors than the native species that overlap with their ecological niche.
Which of the following has the longest fossil record?
A. Homo neanderthalensis B. Homo erectus C. Homo sapiens D. Homo habilis E. Homo heidelbergensis