Evolutionary Relationships Answers

Why was modern classification invented?

In a cladogram, what occurs at a node?

Consider the phylogenetic tree of Old World primates.According to the tree, which primates share the most recent common ancestor with humans?

Consider the cladogram.Which group of organisms has the derived characteristics of true tissues, bilateral symmetry, and a pseudocoelom?

Consider the cladogram.According to the cladogram, which organisms have roundworms as a common ancestor?

Which describes the modern classification system?

Which of the following are Phylogenetic trees also know as ?

A scientist discovers a new organism that is related to clownfish. What can the scientist discover by using molecular clocks?

Julia is trying to place a duckbilled platypus, lizard, bear, and monkey on a phylogenetic tree. She learns that the duckbilled platypus, bear, and monkey are classified as mammals. She also learns that mammals share a common ancestor with reptiles. Which additional piece of information will be most helpful to Julia to properly build her phylogenetic tree?

Dr. Digger, a paleontologist, finds a fossil that he describes in his journal.The creature was approximately 1 meter long, with its backbone fused into a large shell covering the body cavity. It had a beaklike mouth, without teeth, and all four limbs were in the form of flippers.Based on anatomical similarities, to which modern animal is Dr. Digger’s creature most closely related?