Costal facets are found on the ________ vertebrae.
Fill in the blank(s) with the appropriate word(s).
thoracic
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Methane is usually released directly to the atmosphere in environments without an overlying ________ water zone.
Fill in the blank(s) with the appropriate word(s).
The compound 5-bromodeoxyuridine (BrdU) is a derivative of uracil, and if BrdU becomes incorporated during DNA replication, it pairs with adenine. This compound is best classified as which type of mutagen?
A) base analog B) deaminating agent C) oxidative agent D) alkylating agent E) intercalating agent
Nucleoplasm is (are)
A. materials inside the nucleus. B. cytoplasm. C. nonliving protoplasm. D. the excessive amounts of particles located in the cytoplasmic region of the cell.
In plants, most differentiated cells retain
A) only a tiny fraction of their original set of genes. B) a complete set of their genes but lose the ability to express most of those genes. C) a complete set of their genes and retain the ability to express those genes under certain circumstances. D) the ability to dedifferentiate but then cannot return to their original differentiated state.