Organisms far from each other on the "Tree of Life"
A) are genetically very similar
B) are genetically very different
C) look very similar to the eye
D) are genetically identical
B
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Photosynthesis produces ______________ in the atmosphere
a. carbon dioxide b. oxygen c. argon d. carbon monoxide
An electron is released such that its initial velocity is from right to left across this page. The electron's path, however, is deflected in a direction toward the bottom edge of the page due to the presence of a uniform magnetic field. What is the direction of this field?
a. from bottom edge to top edge of the page b. into the page c. from right to left across the page d. out of the page
Helium always has two neutrons in its nucleus
Indicate whether the statement is true or false
Astronomers now speculate that a galaxy's shape depends on all of the following except
a. the rate of star formation. b. the history of past collisions. c. the mass. d. All of the other choices may be important in determining a galaxy's shape.