Chloroplasts
a. resemble photosynthetic bacteria.
b. utilize the same pigments regardless of what
organism they are in.
c. apparently evolved from mitochondria.
d. utilize DNA derived from the nucleus.
e. are all of these.
Answer: a
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The formation of complex molecules that form life is made possible by what understanding regarding carbon?
A. Carbon forms a maximum of 8 covalent bonds. B. Carbon can form a maximum of 6 covalent bonds. C. Carbon forms up to 4 covalent bonds. D. Carbon forms 2 covalent bonds. E. Carbon forms an ions and cations.
The monarch butterfly is poisonous to birds; therefore, birds avoid eating them. Viceroy butterflies look very similar
to monarch butterflies, but are not poisonous. Because they look like monarch butterflies, birds also do not eat viceroy butterflies. This is an example of ____.
a. resource partitioning b. competitive exclusion c. mimicry d. camouflage e. commensalism
In 1918, the tsar and tsarina of Russia and their five children were presumably assassinated and buried in an unmarked grave
Later, several women came forward and claimed that they were in fact Anastasia, one of the daughters whose bones had not been found. More recently, forensic scientists have extracted DNA, including mtDNA, from the skeletal remains. Which of the following samples of mtDNA had to be analyzed to discern which, if any, of the claimants was Anastasia? A) the tsar, tsarina, and the other assassinated children B) each of the claimants or their living children C) the tsarina and the claimants D) the tsar and tsarina only E) the tsar and tsarina and living relatives of each of them
Which circumstance led to the collapse of the Khmer civilization?
a. road building b. salty soils from irrigation c. reforestation d. change in climate