17. the enzyme dna polymerase works only in the 5' to 3' direction. how does this affect the leading strand and the lagging strand? o a. dna polymerase can use only the leading strand as a template. a different enzyme is used to synthesize dna on the lagging strand o b. dna polymerase can work on both the leading and the lagging strand but is much faster on the leading strand o c. dna polymerase can work continuously on the leading strand but must flip the lagging strand around before it can work on it o d. dna polymerase can work continuously on the leading strand but works discontinuously on the lagging strand, creating okazaki fragments.

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