The correct answer is - D. Biodiversity resulting from few ancestors.
The adaptive radiation is an evolutionary process in which diversification is appearing among a species, and it starts to fill in different ecological niches.
The adaptive radiation occurs when a species starts to evolve into multiple different species. The reason for the diversification is available space in the ecologic niches. The members of the initial species, start to exhibit new behaviors, new ways of feeding, change in coloration, all in order to be better suited for a specific ecological niche.
That they are bigger than normal turtles.
Scientific question
Hypothesis
Conclusion
Observations
Answer:
The answer is D.
Explanation:
The example given in the question is an example of gene flow which can be described as the movement of specific genes from the the gene pool population to population.
The act of catching the bigger fish and letting the smaller ones escape is changing the gene pool of the North East Arctic Cod and causing the next generations to have smaller and smaller sizes which is given as the genetic variation decrease due to gene flow.
I hope this answer helps.