Question

question 9 (mandatory) (2 points)
sometimes, two species may become so interdependent on each other that they can
no longer survive without one another. this is called _.
coevolution
macroevolution
adaptive radiation
extinction
question 10 (mandatory) (2 points)
what focuses on the ancestral relationships that gave rise to the similarities in the
first place?
macroevolution
cladistics
coevolution
key innovation
question 11 (mandatory) (4 points)
researchers often study the evolution of viruses by grouping them into clades based

Explanation:

• Question 9: Coevolution is when two or more species influence each other's evolution. Macroevolution is large - scale evolutionary change. Adaptive radiation is the diversification of a group of organisms into forms filling different ecological niches. Extinction is the end of a species. Since the question is about two species being interdependent, coevolution fits.
• Question 10: Cladistics is a method of classification that focuses on ancestral relationships. Macroevolution is about large - scale evolution. Coevolution is about species influencing each other's evolution. Key innovation is a trait that allows a species to exploit a new niche. So cladistics is the answer.

Answer:

• Question 9: Coevolution
• Question 10: Cladistics