Complex molecules in the interstellar medium are found:
A) uniformly throughout the disk of the Galaxy.
B) scattered evenly throughout the universe, a product of the Big Bang itself.
C) only around the supergiant stars like Betelguese that make their heavy atoms.
D) primarily in the dense dust clouds.
E) on the surfaces of the coolest class K and M stars only.
Question 2
Various observations suggest there may be recent or even continuing volcanic activity on Venus. Which of the following has NOT been observed?
A) bursts of radio energy, similar to those produced by lightning discharges occurring in the plumes of erupting volcanoes on Earth
B) spacecraft detection over a period of days of flowing lava on Venus
C) fluctuations in the level of sulfur dioxide in the planet's atmosphere
D) surface features resembling rift valleys on Earth
E) larger shield volcanoes than Hawaii
A comparison between chromosomes found in a normal human cell and a cancer cell from the same person
Three of the color variants found at Fossil Rim Wildlife Center in Texas
Herniated intervertebral disk: the herniated nucleus pulposus is applying pressure
Off-Center Disk
A thick filament of myosin II molecules
Structure of a complex of a type II DNA methylase with DNA