The infectious agent for Creutzfeld-Jakob disease is a _____.
A) protein
B) fungus
C) bacterium
D) virus
Ans: A) protein
Biology & Microbiology
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The four subunits that make up DNA are called
A) phosphodiesters. B) proteins. C) nucleotides. D) nucleosides. E) polymers.
Biology & Microbiology
The single greatest reservoir(s) of carbon exist(s) in ____
a. the atmosphere b. land food webs c. the ocean d. rocks and sediments e. marine organisms
Biology & Microbiology
The cardiac muscle of the heart is called the
a. pericardium. b. endocardium. c. endothelium. d. chordae tendineae. e. myocardium.
Biology & Microbiology
Sexual dimorphism has arisen as a result of ____.
A. stabilizing selection B. heterozygote superiority C. kin selection D. sexual selection E. directional selection
Biology & Microbiology