Carla is having problems with infections. Which body system is failing?
A. integumentary system
B. cardiovascular system
C. immune system
D. urinary system
E. musculoskeletal system
Answer: C
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The urinary bladder, identified as ____ in the
above diagram, is separated from the ____ by a sphincter.
a. A; ureter b. C; ureter c. A; urethra d. C; urethra e. none of these letters; urethra
Carbon dioxide enters a plant from the atmosphere through pores called
A. guard cells. B. companion cells. C. sieve tubes. D. nodes. E. stomata.
The immunochemical test that involves the agglutination of an artificial carrier particle with the antigen bound to its surface and an antibody present in a specimen is referred to as:
a. double immunodiffusion. b. counterimmunoelectrophoresis. c. particle agglutination. d. enzyme immunoassay.
The evolution of many species from a single common ancestor is called
a. adaptive radiation b. punctuated equilibrium c. genetic drift d. disruptive selection e. microevolution