Answer:
B.Fish A because it will have shorter generation times and more offspring .
Explanation:
We have two species of fish A and B
Fish A has a gestation time of three months and lays 300 eggs per clutch.
Fish B has a gestation time of 5 months and lays 200 eggs per clutch.
We have to find which one makes better model organism and why.
We can see that fish A has gestation period of 3 months and fish B has gestation period of 5 months and produced 300 offsprings by fish A and 200 offsprings by fish B .The number of offsprings produced by fish B are smaller than the number of offsprings produced by fish A.The time taken by fish A for gestation is shorter than the time taken for gestation by fish B.
We can see that fish A takes short time for gestation and gives large number of offsprings and fish B takes longer time and gives small number of offsprings.
Therefore, fish A makes better model organism because it takes shorter time and gives large number of offsprings .
Hence, option B is true.
Answer:B.Fish A because it will have shorter generation times and more offspring .