Gymnosome pteropods are primarily
a. herbivores.
b. carnivores.
c. detritovores.
d. omnivores.
e. filter feeders.
B
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Sound waves arriving at a listener first strike the _____
A) tectorial membrane B) tympanic membrane C) round-window membrane D) hair cell membrane E) basilar membrane
If a region of DNA contained numerous mismatches due to a modifying agent that caused methylation of guanine, which of the following mutagens is most likely the cause?
A. Ionizing energy such as gamma radiation B. An intercalating agent such as acridine orange C. A DNA modifier such as an alkylating agent D. A deaminating base such as nitrous oxide
All of the following substances are used to preserve foods EXCEPT
A. calcium propionate. B. sodium nitrite. C. nisin. D. biguanides. E. potassium sorbate.
Which region(s) of the adult brain is/are derived from the metencephalon?
a. cerebellum only b. pons only c. medulla oblongata only d. cerebellum and pons e. medulla oblongata and pons