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

Biology & Microbiology

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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

Biology & Microbiology

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.

Biology & Microbiology

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

Biology & Microbiology

By definition, menstruation begins on what day of the nonpregnant uterine cycle?

A. 1 B. 7 C. 21 D. 30

Biology & Microbiology