The average life expectancy for males in the United States is ____
a. 80 years
b. 79 years
c. 76 years
d. 74 years
e. 65 years
ANSWER: d
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Which characteristic of birds is essential to their ability to fly?
a. pneumatic bones b. cutaneous respiration c. a lateral line d. mammalian lungs
In the three domain system of classification,
A. eukaryotes are more similar to the prokaryotes now classified into domain Bacteria than to those now classified into domain Archaea. B. animals and plants are less similar to each other than to the prokaryotes now classified into domain Archaea. C. prokaryotes are classified into two domains, with the organisms in domain Archaea more similar to eukaryotes than to the prokaryotes in the domain Bacteria. D. cladistics alone were used to formulate the new phylogenetic tree of life. E. by the principle of parsimony, it required fewer assumptions to divide the prokaryotes into two domains than it did to put them into a single domain.
If the mRNA codon for proline can be CCU, CCC, CCA, or CCG, an mRNA strand to encode for the use of proline in a protein could be
A. GGG. B. GGA. C. CCC. D. All of these answers are true.
An inoculating loop or needle is sterilized in a flame or incinerator:
What will be an ideal response?