Question

The following shows one phylogeny for baleen whales. Which one of the following statements can be concluded from this phylogeny?

a) All baleen whales have a common ancestor
b) Baleen whales do not share a common ancestor
c) The phylogeny is incomplete
d) Phylogeny is unrelated to baleen whales

Answer 1

From the phylogenetic tree for baleen whales, it can be concluded that all baleen whales share a common ancestor, as indicated by the singular point from which all baleen whale species branch off.

Step-by-step explanation:

The question pertains to a phylogenetic tree which represents the evolutionary relationships among various species. When considering a phylogenetic tree for baleen whales, the correct conclusion is that all baleen whales have a common ancestor. This is depicted in the branching pattern of the tree where all baleen whale species stem from a singular point, representing the common ancestor.

An example of such a tree could show that cetaceans, which include both toothed and baleen whales, share a common ancestry with other even-toed ungulates such as hippos, cows, and pigs, emphasizing their evolutionary relationships. This common ancestry precedes the divergence of these species into their distinct lineages.