What organ enables reptiles and mammals to respond to pheromones?
a. Antennae
b. Olfactory receptors
c. Nasal cavity
d. Vomeronasal organ
e. Tongue
d
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Viral release from a eukaryotic cell
A. requires the production of lysozyme encoded by the viral genome. B. requires the production of lysozyme encoded by the eukaryotic genome. C. is essential to envelope formation. D. kills the infected cell. E. requires the production of lysozyme encoded by the viral genome and kills the infected cell.
Mendel studied what he called characters and traits. What is the relationship between these terms?
a. Characters were heritable characteristics; traits were variations of characters. b. Traits were heritable characteristics; characters were variations of traits. c. Characters were the unknown package of transfer to the next generation; traits resulted from this transfer. d. Characters were passed to the next generation; traits were never passed to the next generation. e. Characters and traits were synonymous in Mendel's writings.
Which list has structures that are involved only in the sense of hearing?
A) middle ear bones, semicircular canals, basilar membrane B) eardrum, utricle, organ of Corti C) oval window, cochlea, aqueous humor D) oval window, basilar membrane, organ of Corti
When the end product of a pathway inhibits catalysis of the first step of that pathway, this phenomenon is called ________.
A. feedback inhibition B. reversible covalent modification C. noncompetitive inhibition D. metabolic channeling