Evolutionary trees depict phylogenies over time. The y-axis (top to bottom) on this tree represents time.
The more recent changes occur at the top. Notice the fork-like pattern of this diagram. The tips of each fork lead to an organism or a group of organisms. The root of each fork leads to a common ancestor. The more closely grouped organisms are, the more closely related they are. This is because they share a most recent common ancestor. The forking between two organisms shows where they diverged into separate species from their common ancestor.
Examine the phylogenetic tree below. Select the location that indicates the common ancestor organisms 1, 2 and 3 share.
Examine the phylogenetic tree below. Select the location that indicates the common ancestor organisms 1, 2 and 3 share.
Examine the phylogenetic tree below. Select the location that represents the most recent common ancestor organisms 2 and 3 share.
Examine the phylogenetic tree below. Select the location that represents the most recent common ancestor organisms 2 and 3 share.
How many speciation events occurred in this cladogram?
