Disease-causing organisms are classified as
1.fomites.
2.biological vectors.
3.mechanical vectors.
4.pathogens.
5.antigens.
4
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Which of the following statements about biological clocks is false?
a. They are limited to vertebrates. b. They are regulated by clock proteins that act both within and outside the nervous system. c. They have complex feedback loops. d. They are controlled by genes. e. They are capable of sustaining biological rhythms independently of environmental cues.
Select all of these that are common effects females experience in the first months of pregnancy.
a. heartburn b. vom c. consti d. All of these
Tiny aquatic organisms that swim or move with water currents are
A. plankton. B. benthic. C. endospores. D. colonial.
When a cell expands in diameter, volume increases by the ____ of the diameter, and surface area increases by the____ of the diameter.
A. square; square B. square; cube C. cube; square D. cube; cube E. square root; square root