#Question id: 4644
#Unit 11. Evolution and Behavior
The treeʹs horizontal axis is a timeline that extends from 100,000 years ago to the present; the vertical axis represents nothing in particular. The labeled branch points on the tree (V—Z) represent various common ancestors. Letʹs say that only since 50,000 years ago has there been enough variation between the lineages depicted here to separate them into distinct species, and only the tips of the lineages on this tree represent distinct species.
According to this tree, what percent of the species seem to be extant (i.e., not extinct)?
#Question id: 3284
#Unit 11. Evolution and Behavior
The fitness of three genotype are A1A1 < A1A2 = A2A2) Which of the following observation correct?
#Question id: 31069
#Unit 2. Cellular Organization
#Question id: 46
#Unit 1. Molecules and their Interaction Relevant to Biology
The three-dimensional structure of a protein is determined primarily by:
#Question id: 23098
#Unit 12. Applied Biology