Which best describes fusion nuclear reactors?
a. they use rods containing uranium for fuel
b. they are currently used for electricity in several highly populated countries
c. they are used in some naval vessels, such as submarines
d. they have been successful, but they are very expensive to operate

The diagram shows the structures of horse and cat forelimbs. what does the diagram suggest about the evolutionary relationship between these two mammals? a. they have homologous structures, indicating a common ancestor. b. they have analogous structures, indicating a common ancestor. c. they have homologous structures, indicating that they do not have a common ancestor. d. they have analogous structures, indicating that they do not have a common ancestor.

What must occur for air masses to form fronts

8.98 dm3 of hydrogen gas is collected at 38.8 °c. find the volume the gas will occupy at -39.9 °c if the pressure remains constant.