The term mixotroph indicates that an organism __________.
a. can be both photoautotrophic and autotrophic
b. can be both parasitic and free-living
c. can be both heterotrophic and autotrophic
d. has both unicellular and multicellular parts of its life cycle
e. has both bacterial and archaeal features as a result of endosymbiosis
Answer: c. can be both heterotrophic and autotrophic
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The principle of comparative advantage holds that nations should
a. specialize in activities for which they have the lowest opportunity cost. b. strive to become self-sufficient in production. c. produce only goods and services for which they have absolute advantage. d. become less labor-intensive and more capital-intensive.
Which item below is unique to eukaryotic cells?
a. cell wall b. plasma membrane c. nucleoid d. ribosomes e. vacuole
Nutrients pass through this
a. A b. B c. C d. D e. E
What kind of system do annelids have in which blood flows through a continuous system of vessels?
A. Respiratory system B. Complete digestive system C. Closed circulatory system D. Nervous system E. Open circulatory system