Protists are a diverse group of organisms. Which of the following is not characteristic of protists?
1.May be multicellular or unicellular.
2.May have DNA in a plasmid or in a nucleus.
3.May reproduce sexually or asexually.
4.May be autotrophs and/or heterotrophs.
2
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The most likely identification of a bile-resistant, kanamycin-resistant, colistin-resistant, and vancomycin-resistant anaerobic gram-negative bacilli is:
a. nonpigmented Prevotella. b. Porphyromonas spp. c. B. fragilis group. d. Fusobacterium spp.
Light-independent reactions occur in the ____
a. cytoplasm b. chloroplast outer membrane c. thylakoid membrane d. stroma e. matrix
The oxygen-carrying component in red blood cells is
A) hemoglobin. B) bicarbonate ions. C) iron atoms freely floating in the blood plasma. D) the cell membrane.
The polymerase chain reaction (PCR) has been used in all of the following fields, except
A. gene mapping. B. medicine. C. forensics. D. evolutionary studies. E. None of the choices; it is useful for all these fields.