Scientist use squid nerve cells in research because the nerve cells of a square or 1000 times better than those of a human. How is the outcome of a nerve cell most likely to be affected if scientist were to study human nerve cells directly?
a - The outcome would be different because humans and squid are very different
b - The outcome would be different because the nerve cells in squids are much higher than those of humans.
c - The outcome would be the same because in both cases a nerve cell is being researched
d - The outcome would be the same because genes in squids and humans are 85% identical

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

Explain how paleontologists use trilobite fossils as index fossils for various geologic time periods.

What process decreases the salinity of ocean water? decreased precipitationdecreased melting of glaciersincreased evaporationincreased runoff from rivers