Which structure below is unique to organisms that harness solar energy to make sugar?
a. endoplasmic reticulum
b. chloroplast
c. plasma membrane
d. chromosome
e. nuclear envelope
ANSWER: b
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Which of the following constitute the vestibular apparatus?
A. saccule and utricle only B. semicircular canals, saccule, and utricle C. ampullae of Lorenzini D. saccule, utricle, and Organ of Corti E. saccule, utricle, and ventricle
When an allele can produce a range of phenotypes, its expression is said to be
a. clearly established. b. variable. c. codominant. d. incompletely dominant. e. incompletely penetrant.
Which of the following would NOT be included in the reaction chamber of an experiment intended to
duplicate the atmosphere of ancient earth? a. carbon dioxide b. hydrogen gas c. carbon monoxide d. water vapor e. nitrogen gas
By definition, menstruation begins on what day of the nonpregnant uterine cycle?
A. 1 B. 7 C. 21 D. 30