The following questions refer to the evolutionary tree in Figure 22.2.
The horizontal axis of the cladogram depicted below is a timeline that extends from 100,000 years ago to the present; the vertical axis represents nothing in particular. The labeled branch points on the tree (V-Z) represent various common ancestors. Let's say that only since 50,000 years ago has there been enough variation between the lineages depicted here to separate them into distinct species, and only the tips of the lineages on this tree represent distinct species.

Figure 22.2
-Which pair would probably have agreed with the process that is depicted by this tree?
A) Cuvier and Lamarck
B) Lamarck and Wallace
C) Aristotle and Lyell
D) Wallace and Linnaeus
E) Linnaeus and Lamarck

Question

The following questions refer to the evolutionary tree in Figure 22.2.
The horizontal axis of the cladogram depicted below is a timeline that extends from 100,000 years ago to the present; the vertical axis represents nothing in particular. The labeled branch points on the tree (V-Z) represent various common ancestors. Let's say that only since 50,000 years ago has there been enough variation between the lineages depicted here to separate them into distinct species, and only the tips of the lineages on this tree represent distinct species.
  
Figure 22.2
-Which pair would probably have agreed with the process that is depicted by this tree?
A) Cuvier and Lamarck 
B) Lamarck and Wallace 
C) Aristotle and Lyell 
D) Wallace and Linnaeus 
E) Linnaeus and Lamarck

Quizplus · Accepted Answer

Lamarck believed in the inheritance of acquired characteristics and the idea of change over time (evolution), while Wallace is known for independently proposing the theory of natural selection as a mechanism for evolution. Both of these ideas are consistent with the process depicted on this tree. Cuvier believed in fixity of species and catastrophism, Aristotle had a scala naturae (ladder of life) classification system, Lyell proposed uniformitarianism, and Linnaeus developed the binomial classification system. None of these views align with the process depicted on the tree.

The Following Questions Refer to the Evolutionary Tree in Figure