What does this graph tell us about humans compared to other animals?
A) Humans have a brain that is unusually large for an animal of our size.
B) Humans have the largest brains of any animal.
C) Unlike the brains of other animals, human brains cannot be described by a straight line.
D) Based on averages determined from other animals, human brains are precisely the size we'd expect for animals of our weight.
A) Humans have a brain that is unusually large for an animal of our size.
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Molecular clouds are mapped using CO instead of hydrogen because CO is much more abundant than hydrogen in molecular clouds
Indicate whether the statement is true or false
Why did fusion cease only about 5 minutes after the Big Bang (at the end of the era of nucleosynthesis)?
A) The density of the universe became too low. B) There was no long any more hydrogen available for fusion reactions. C) Too many heavy elements were produced. D) Neutrinos carried off too much energy.
The alkali metals have ______________ valence electron(s)
Fill in the blank(s) with correct word
Choose the statement below that does NOT help explain why the ionization energy of cadmium is so much larger than that of indium