What is an autoimmune disorder that affects the skeletal system?
a. Graves’ disease
b. rheumatoid arthritis
c. Hashimoto’s disease
d. osteoarthritis
e. polio
ANSWER: b
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The bulk of the reabsorption of useful materials by the kidney takes place in the
A. renal corpuscle. B. proximal convoluted tubule. C. loop of Henle. D. distal convoluted tubule. E. collecting ducts.
How is the grasshopper mouse able to consume the Eleodes longicollis beetle?
a. The grasshopper mouse avoids the undesirable secretions by burying the beetle's abdomen. b. The grasshopper mouse has cryptic coloration so that the beetle does not notice him. c. The grasshopper mouse is immune to the beetle's toxins. d. The grasshopper mouse poisons the beetle first. e. The grasshopper mouse uses heat detectors to easily locate the beetle.
In which of the following would the most highly conserved sequences of nuclei acids be located?
(A) Structually critical regions of a polypeptide such as an active site region (B) The intron regions of pre-mRNA sequences (C) Ribosomal RNA sequences (D) Bacterial genes conferring antibiotic resistance
The biological species concept:
a. states that any organisms that are biologically similar constitute a species. b. states that a species is any group that shares similar DNA. c. is infrequently used because it is inapplicable to many organisms. d. defines a species as any group of actually or potentially interbreeding species that produce viable offspring. e. is the best and most accurate species concept