Biology, 27.02.2020 04:14 helpmeplz33
In the classic experiment conducted by Hershey and Chase, why was the pellet radioactive in the centrifuge tube that contained bacteria with viruses?
( ) The bacteria were in the pellet, and many contained the radioactive viral DNA.
( ) The bacteria were in the pellet, and they had incorporated radioactive proteins into their
cell membranes.
( ) The radioactive protein coats of the viruses were in the pellet.
( ) The radioactive viruses (coats plus DNA) were in the pellet.
( ) The radioactive viruses were in the pellet, and the bacteria were in the supernatant.
Answers: 2
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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
Answers: 2
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