This evolutionary tree shows the influence of speciation and extinction on the diversity of life.After 2 million years,lineage A had a(n)________ rate of speciation and ________ extinction rates compared to lineage B.
A)higher;lower
B)lower;higher
C)increased;decreased
D)improved;enhanced

Question

This evolutionary tree shows the influence of speciation and extinction on the diversity of life.After 2 million years,lineage A had a(n)________ rate of speciation and ________ extinction rates compared to lineage B.
A)higher;lower 
B)lower;higher 
C)increased;decreased 
D)improved;enhanced

Quizplus · Accepted Answer

The evolutionary tree shows that lineage A has more branches and therefore more species than lineage B. This suggests that lineage A had a higher rate of speciation compared to lineage B. Additionally, lineage A has fewer extinct species compared to lineage B, indicating lower extinction rates. Therefore, the correct option is A) higher; lower.

This Evolutionary Tree Shows the Influence of Speciation and Extinction