Polymorphism may be detected at the phenotypic level when 

A. A sequence affects gene function

B. At the restriction fragment level when it affects a restriction enzyme target site, 

C. At the sequence level by direct analysis of DNA.

Which of the above is/are correct statement

#Question id: 9620

#Unit 9. Diversity of Life Forms

The two extant species that are most closely related to each other are

#Question id: 9621

#Unit 9. Diversity of Life Forms

If this evolutionary tree is an accurate depiction of relatedness, then which of the following should be correct?

1. The entire tree is based on maximum parsimony.

2. If all species depicted here make up a taxon, this taxon is monophyletic.

3. The last common ancestor of species B and C occurred more recently than the last common ancestor of species D and E.

4. Species A is the direct ancestor of both species B and species C.

5. The species present at position 3 is ancestral to C, D, and E

#Question id: 9622

#Unit 9. Diversity of Life Forms

Which of the following numbers represents a polyphyletic taxon? 

#Question id: 10323

#Unit 9. Diversity of Life Forms

If this figure is an accurate depiction of relatedness, then which taxon is unacceptable, based on cladistics?

#Question id: 10324

#Unit 9. Diversity of Life Forms

Which of the following is not true of all horizontally oriented phylogenetic trees, where time advances to the right?

#Question id: 10325

#Unit 9. Diversity of Life Forms

Ultimately, which of these serves as the basis for both the principle of maximum parsimony and the principle that shared complexity indicates homology rather than analogy?