Multiple Choice
Can two different species, from the same clade, have more than one common ancestor? Choose the MOST correct answer and explanation.
A) No, if they are a clade then you have to assume that they have the same common ancestor.
B) No. They can have many common ancestors, depending on how far back you go in the tree. They cannot have more than one most recent common ancestor.
C) Maybe. Only a paraphyletic clade would have more than one common ancestors.
D) Yes. Dogs and cats have a common ancestor that gave rise to mammals, and an older common ancestor that gave rise to vertebrates. The most recent common ancestor is the point at which two species diverged from each other.
E) Yes. If they are related then they must have common ancestors all along the way. Doesn't everyone?
Correct Answer:

Verified
Correct Answer:
Verified
Q4: When researchers calibrate the molecular clock they
Q5: How does the phenomenon of horizontal gene
Q6: Horizontal gene transfer is thought to have
Q7: A modern goal of systematics is to
Q8: Use the principle of parsimony and molecular
Q10: Once organisms are classified as to their
Q11: The shaded group includes all of the
Q12: If the genus Quercus (oaks) is monophyletic,
Q13: Thick-skinned rhinoceroses and elephants were once classified
Q14: When you are classifying a species based