The loss of an electron from a neutral helium atom results in
A) neutral hydrogen.
B) ionized hydrogen.
C) ionized helium.
D) neutral deuterium.
E) ionized deuterium.
Question 2
The extent to which Mars has been habitable essentially boils down to the
A) question of whether liquid water has ever been present on its surface
B) question of whether oceans of liquid water have existed on its surface
C) amount of water that has been present on its surface
D) length of time liquid water has been present at or below its surface
Allen Test: An occluded ulnar artery results in continued pallor of the hand while the radial artery
Marine Worm Under An Electron Microscope
Scorpions, Spiders and Sharks: Electron-Microscope Images
Neutral Technological Change
Electron micrograph of plasmids isolated from E. coli
The Meselson–Stahl experimental results