#Question id: 4646
#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.
Which of the five common ancestors, labeled V—Z, has been least successful in terms of the percent of its derived species that are extant?
#Question id: 4286
#Unit 3. Fundamental Processes
Transport vesicles
a. can have a clathrin coat. b. can be coated with a heteromeric COPI and COPII coat.
c. can contain assembly proteins.
d. can shuttle proteins from mitochondria to the endoplasmic reticulum.
e. can fuse with target organelles.
#Question id: 27021
#Unit 10. Ecological Principles
#Question id: 27387
#Unit 1. Molecules and their Interaction Relevant to Biology
#Question id: 2204
#Unit 2. Cellular Organization
A mutant channel protein is expressed in an oocyte. Compared to patch clamping experiments in oocytes expressing the normal channel, the length of downward deviations is diminished by half. This indicates: