#Question id: 5649
#Unit 5. Developmental Biology
From earliest to latest, the overall sequence of early development proceeds in which of the following sequences?
#Question id: 30112
#Unit 1. Molecules and their Interaction Relevant to Biology
#Question id: 10657
#Unit 10. Ecological Principles
Assuming these age-structure diagrams describe human populations, in which population is unemployment likely to be a societal issue in the future?
#Question id: 1859
#Unit 4. Cell Communication and Cell Signaling
Defects in the neutrophil NADPH oxidase system result in:
#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)?