Where is most of the Earth’s phosphate found?
a. ocean water
b. aquifers
c. the atmosphere
d. rocks and sediments
e. plants
ANSWER: d
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In eukaryotes, general transcription factors _____
A) are required for the expression of specific protein-encoding genes B) bind to other proteins or to the TATA box C) inhibit RNA polymerase binding to the promoter and begin transcribing D) usually lead to a high level of transcription even without additional specific transcription factors E) bind to sequences just after the start site of transcription
A neuron's __________ receive signals, and its __________ transmits signals. Fill in the blank(s) with the appropriate word(s)
Smokers who have a heart attack are nearly four times as likely as nonsmokers to die from it.
a. true b. false
Complete the analogy: ________ are to vertebrate evolution as ________ are to plant evolution
A) Lungs; stomata B) Amniotic eggs; seeds C) Limbs; flowers D) Opposable thumbs; hyphae