How can a compass be used to determine if an electromagnet is working?
a. move the compass near the electromagnet. if the compass needle points away from the electromagnet, then the electromagnet is working.
b. move the compass near the electromagnet. if the compass needle points toward the electromagnet, then the electromagnet is working.
c. if the compass and the electromagnet are put end-to-end, and the compass repels the electromagnet, then the electromagnet is working.
d. if the compass and the electromagnet are put side-by-side, and the compass attracts the electromagnet, then the electromagnet is working.
(b. i think? )

Read the following scenario to answer the following question. in some zoos, rare crosses between a male lion and a female tiger have produced hybrid offspring called "ligers." male ligers are sterile but some female ligers are fertile. in the wild, lion and tiger ranges do not naturally overlap, making such a cross unlikely. furthermore, the solitary behavior of tigers and the social organizations of lions create behavioral differences. applying the biological species concept, the sterility of ligers reveals that a. lions are probably a subspecies of tigers b. tigers and lions are the same species c. a new species called "ligers" is forming d. tigers and lions are separate species

Fossils of ancestors of the modern horses show a small 4-toed almost dog-like browsing animal named eohippus over time the horses got larger lost toes and changed to a grazing diet what is the best explanation of why this change occurred

Genetic orders can result when sister chromatids fail to separate properly during which phase is this problem most likely to occur