Which of the following is not a characteristic feature of chordates during development?
A. notochord
B. neural tube
C. myotomes
D. All of these are seen during development.
D
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Primary growth at the apical meristems can produce cells that differentiate into each of these cell types, except which?
A. leaves B. ground tissue C. procambium D. cork cambium E. epidermis
Some protists have a pellicle, which is used for
a. defensive purposes. b. sexual reproduction. c. structural support. d. water absorption. e. food storage.
What specific amino acid difference did you discover between normal and sickle-cell betaglobin?
a. Glutamine is replaced by valine. b. Valine is replaced by glutamic acid. c. Glutamic acid is replaced by valine. d. No differences were detected.
Although most metabolic reactions are freely reversible, a few irreversible catabolic steps are bypassed during biosynthesis with special enzymes that catalyze the reverse reaction in order to allow for independent regulation of catabolic and anabolic pathways.
Answer the following statement true (T) or false (F)