The largest group and most important marine photosynthetic organisms are:
a. kelp.
b. seagrasses.
c. macroalgae.
d. phytoplankton.
e. giant kelps.
D
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All organisms are alike in their
a. requirements for energy. b. participation in one or more nutrient cycles. c. ultimate dependence on the sun. d. interaction with other forms of life. e. all of these.
Smooth muscles
a. are not striated. b. have spindle-shaped cells. c. are found in the walls of hollow structures such as blood vessels and the stomach. d. are involuntary. e. include all of these descriptions.
Physicians feel that the best way to differentiate between a fibroadenoma and a malignant tumor in the breast is through _____.
A. needle aspiration B. a biopsy C. a mammogram D. an MRI scan
Helicobacter pylori has been associated with ____.
A. irritable bowel syndrome B. duodenal ulcers C. stomach ulcers D. HPV E. GERD