You recently got strep throat, caused by streptococcal bacteria. You took antibiotics, and your strep throat seemed to be cured. However, a week later, the symptoms of strep throat are back and the antibiotics are no longer effective. The survival of the antibiotic-resistant streptococcal bacteria can be attributed to . Select one: a. Genetic Frequency b. Hardy Weinberg Equilibrium c. Stochastic Events d. Natural Selection

Select all the true statements about the cosmic microwave background radiation

Refer to this portion of a dichotomous key for fish identification to answer the question. 1. (a) has a single dorsal fin ® 5 (b) has a double dorsal fin ® 2 2. (a) one fin is spiny, the other is smooth ® 3 (b) one fin is not spiny or smooth ® 4 5. (a) has small fin on back near tail ® 6 (b) has no fin on back near tail ® 7 6. (a) has barbs near the mouth ® catfish (b) does not have barbs near the mouth ® 10 7. (a) tail is asymmetrical ® 8 (b) tail is symmetrical ® 9 10. (a) scales are small ® trout (b) scales are large ® whitefish what is the next step to complete to identify a fish that has a single dorsal fin, no fin on the back near the tail, and no barbs near the mouth? step 2 step 5 step 7 step 10

As molecules are formed from metabolism, entropy __ and the universe becomes less disordered. a. is decreased b. is increased c. moves closer to equilibrium d. is unchanged