Many organisms grow in areas where sun and nutrition sources are poor, such as the hydrothermal vents at the bottom of the ocean. By what process do these organisms make their own food?

a. photoautotrophy
b. diffusion
c. chemoautotrophy
d. predation


c. chemoautotrophy

Biology & Microbiology

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Which region of a structural gene contains the information that specifies an amino acid sequence?

A. promoter region B. transcribed region C. terminator D. regulatory sequence E. enhancer region

Biology & Microbiology

Select the immunoglobin (Ig) classes that is correctly matched to their facts. Check all that apply.  

_____  IgA—found in saliva, tears, the GI tract, and mother's milk _____  IgD—serve as receptors on the surfaces of T cells _____  IgE—promotes the release of histamine from mast cells and basophils, causing allergy symptoms _____  IgG—a minor form of immunoglobulin, used only in response to parasitic worms _____  IgM—first secreted during primary response, promotes agglutination, activates complement

Biology & Microbiology

To which of the following groups does the

organism in the above figure belong? a. diplomonads, parabasalids, trypanosomes, and euglenoids b. ciliates, dinoflagellates, and apicomplexans c. water molds, diatoms, and brown algae d. chlorophyte and charophyte algae e. amoebas and slime molds

Biology & Microbiology

Which of the following leukocytes have granules in their cytoplasm that stain blue with methylene blue?

A) eosinophils B) monocytes C) lymphocytes D) neutrophils E) basophils

Biology & Microbiology