Answer:
Gene mutation
Explanation: Gene mutation is a biological term used to describe the change in the genetic sequence or nucleotide composition of one or more of the gene composition of an organism, this gene mutation usually leads to abnormalities in the affected organism as described in the above question, the DNA of the shellfish contained an extra Nitrogen base pair which has made it different from other shelf fishes.
I believe the awnser is (4), it makes the most sense, according to the graph.
You can look up the question copy and paste it and put quizlet or regents at the end and it will bring you to an answer on one of those :) hope this can help
The correct answer is:
A. effects of dams on society
Explanation:
The exchange of a river's flow and sediment conveyor downstream of a dam often causes the greatest sustained environmental impacts. Yet even complex changes in the number and timing of water flows impact aquatic and riparian life, which can explain the biological web of a river system.
