Question

week 5 - assessment
0:51:09 remaining

anthropoids

1. a

hominins

1. b

dry-nosed

1. c

1. d

Explanation:

Identify the nodes on the primate phylogenetic tree

Using the Phylogeny and Systematics knowledge points

• Node A represents the common ancestor of all primates shown (wet-nosed primates/strepsirrhines and dry-nosed primates/haplorhines).
• Node B represents the common ancestor of dry-nosed primates (haplorhines), which split into tarsiers and anthropoids. Thus, B marks the dry-nosed primates clade.
• Node C represents the common ancestor of anthropoids (monkeys and apes), separating them from tarsiers.
• Node D represents the common ancestor of hominoids (apes: gibbons, orangutans, gorillas, chimpanzees, and humans).
• Node E represents the common ancestor of hominins (humans and their extinct bipedal ancestors), separating them from chimpanzees/bonobos.

Match the taxonomic groups to the corresponding nodes

Using the Phylogeny knowledge point

• anthropoids: This group includes New World monkeys, Old World monkeys, and apes (including humans). The common ancestor of this clade is represented by Node C.
• hominins: This group includes humans and our closest extinct relatives after the split from chimpanzees. The lineage leading uniquely to humans is represented by Node E.
• dry-nosed: This group (haplorhines) includes tarsiers, monkeys, and apes. The common ancestor of this clade is represented by Node B.
• hominoids: This group (apes) includes gibbons, orangutans, gorillas, chimpanzees, and humans. The common ancestor of this clade is represented by Node D.

Answer:

Match the taxonomic groups to the corresponding nodes on the phylogenetic tree:

• anthropoids: <blank>3. C</blank>
• hominins: <blank>E</blank>
• dry-nosed: <blank>2. B</blank>
• hominoids: <blank>4. D</blank>