An organism classified as a eukaryote could be which of the following?
A. a photoautotroph or a photoheterotroph
B. a chemoheterotroph or a photoautotroph
C. a photoheterotroph or a chemoheterotroph
D. a chemoautotroph or a chemoheterotroph
B
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The nervous system structures are derived from ectoderm
Indicate whether the statement is true or false.
Circulation in the accompanying diagram functions primarily as a(n) ____
a. an open circulatory system b. system consisting of mostly of tissue spaces c. closed circulatory system d. interstitial fluid system e. three-directional system
Succession after a disturbance such as forest harvest or a landslide is referred to as ________ succession
Fill in the blank(s) with correct word
A screening system called the ________ test is used for detecting chemicals with carcinogenic potential.
A. cancer B. Ames C. Iowa D. mutation E. Koch