#Question id: 9608
#Unit 9. Diversity of Life Forms
Darwin analogized the effects of evolution as the above-ground portion of a many-branched tree, with extant species being the tips of the twigs. The common ancestor of two species is most analogous to which anatomical tree part?
#Question id: 9607
#Unit 9. Diversity of Life Forms
The common housefly belongs to all of the following taxa. Assuming you had access to textbooks or other scientific literature, knowing which of the following should provide you with the most specific information about the common housefly?
#Question id: 9604
#Unit 9. Diversity of Life Forms
The various taxonomic levels (viz, genera, classes, etc.) of the hierarchical classification system differ from each other on the basis of
#Question id: 9601
#Unit 9. Diversity of Life Forms
The relative lengths of the frog and mouse branches in the phylogenetic tree indicate that
#Question id: 9600
#Unit 9. Diversity of Life Forms
Based on the tree below, which statement is not correct?
#Question id: 11403
#Unit 10. Ecological Principles
Several categories of risk of species extinction have been defined. A species can be determined as critical endangered if there is considered to be