#Question id: 8290
#Unit 9. Diversity of Life Forms
If, someday, an archaean cell is discovered whose rRNA sequence is more similar to that of humans than the sequence of mouse rRNA is to that of humans, the best explanation for this apparent discrepancy would be ________.
#Question id: 8291
#Unit 9. Diversity of Life Forms
Which of the following pairs are the best examples of homologous structures?
#Question id: 8292
#Unit 9. Diversity of Life Forms
Some molecular data place the giant panda in the bear family (Ursidae) but place the lesser panda in the raccoon family (Procyonidae). If the molecular data best reflect the evolutionary history of these two groups, then the morphological similarities of these two species is most likely due to ________.
#Question id: 8293
#Unit 9. Diversity of Life Forms
The importance of computers and of computer software to modern systematics s is most closely linked to advances in ________.
#Question id: 8294
#Unit 9. Diversity of Life Forms
The common ancestors of birds and mammals were very early (stem) reptiles, which almost certainly possessed three-chambered hearts (two atria, one ventricle). Birds and mammals, however, are alike in having four-chambered hearts (two atria, two ventricles). The fourchambered hearts of birds and mammals are best described as ________.
#Question id: 8295
#Unit 9. Diversity of Life Forms
Imagine that a phylogeny was developed for a group of mammals based on bone structure. Which of the following statements would be a reasonable prediction about a phylogeny for the same group of species based on similarities and differences in the structure of a particular enzyme?