17. Most of the dry mass of a plant is the result of uptake of _____. (A) water and minerals through mycorrhizae (B) carbon dioxide and oxygen through stomata in leaves (C) water and minerals through root hairs (D) carbon dioxide through stoma

16. A principal problem with inserting an unmodified mammalian gene into a plasmid and then getting that gene expressed in bacteria is that _____. (A) bacteria translate only mRNAs that have multiple messages (B) prokaryotes use a different genetic code from that of eukaryotes (C) bacteria cannot remove eukaryotic introns (D) bacterial RNA polymerase cannot make RNA complementary to mammalian DNA

17. Most of the dry mass of a plant is the result of uptake of _____.
(A) water and minerals through mycorrhizae
(B) carbon dioxide and oxygen through stomata in leaves
(C) water and minerals through root hairs
(D) carbon dioxide through stoma

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