This is a single choice question; skip ahead to question content incorrect correct answeryour answer a bx c d time spent: 1 min 59 secs content & skills cc5dfc5bchsirs1 what causes duplex dna with a certain (a + t): (g + c) ratio to melt at a higher temperature than comparable length duplex dna with a greater (a + t): (g + c) ratio? a. stronger van der waals forces of pyrimidines b. stronger van der waals forces of purines c. increased π- stacking strength d. reduced electrostatic repulsion of phosphates

What advantages does a pedigree have over a written passage?

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

The pacific plate is an oceanic tectonic plate. how did a hot and the pacific plate interact to form the hawaiian islands?