Why do scientists study proteins to find evidence for evolution? a)protein sequence never change, so scientists study proteins to discover how species organisms evolve. b)protein reflects dna sequences, so scientists study proteins to look for genetic similarities and differences in organisms. c)a lack or presence of proteins in an organisms body indicates whether the organism live on land or in water

Witch type of microscope is used to view very small cell components like proteins and dna?

The similarities of organisms in which two areas numbered above provide the best evidence for common ancestry between organisms in both locations?

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