Blood pressure in veins is lower than blood pressure in arteries, due in part to the larger diameter of veins
Indicate whether the statement is true or false
TRUE
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Gene flow is the
A) migration of individuals between populations. B) transfer of genes within a population. C) variation of alleles within a population. D) movement of alleles between populations.
Which of the following combinations of molecules illustrated could be linked to form a nucleotide?
A) 1, 2, and 11 B) 3, 7, and 8 C) 5, 9, and 10 D) 11, 12, and 13
Humans rely on fossil fuels for much of our energy needs. The burning of fossil fuels adds carbon dioxide (CO2) to the carbon dioxide already in the atmosphere. How do plants help keep some of this extra carbon dioxide from accumulating in the atmosphere?
A) Plants store carbon dioxide in their tissues. B) Plants return carbon dioxide to the ground through their roots. C) Plants take in atmospheric carbon dioxide to produce food. D) Plants break down carbon dioxide into carbon and oxygen.
Amino acids are delivered in their appropriate order by
A) mRNAs. B) RNA-induced silencing complexes (RISC). C) ribozymes. D) rRNAs. E) tRNAs.