The most efficient form of locomotion in the animal kingdom is
A) a human walking.
B) a human on a bicycle.
C) a propeller-driven airplane.
D) a bird flying.
E) railroad trains.
Question 2
One way to describe the allowed matter fields for an isolated hydrogen atom is that they are
A) the electromagnetic fields that can be produced by the orbiting electron.
B) the various possible elliptical shapes for the orbit of the electron.
C) the possible shapes of the electron's charge that will just fit around the nucleus.
D) the possible standing waves that will just fit around the nucleus.
E) the patterns that are spherically symmetric relative to the nucleus.
Early divisions in the animal phylogeny.
Development of the human brain.
Primary visual processing areas (blue) in (a) human (lateral and mesial views) and (b) chimpanzee.
A highly simplified view of the overall plan of the human body.
Staphylococcus aureus cells (yellow) stuck in mucus secreted by human nasal epithelial cells.
Major bone (tan) and cartilage (light blue) elements of the human skeleton. Inset shows regions of v