Which of the following have moist, permeable skin that performs cutaneous respiration?
a. Actinopterygii
b. Urodela
c. Amniotes
d. Squamata
b. Urodela
Urodela—amphibians with tails—have permeable skin that performs cutaneous respiration. Actinopterygii are bony ray-finned fish, amniotes have shelled eggs with amniotic fluid, and Squamata are the largest extant clade of reptiles.
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If 0.08 mol of phenol and 0.03 mol of NaOH are combined in a total volume of 0.1 L, what would be the pH of the solution? The pKa of phenol is 9.9
A. 10.5 B. 8.5 C. 9.5 D. 9.7 E. 9.9
Which one of the following statements about cerebrospinal fluid (CSF) specimens is false?
A) They are collected only by physicians. B) They are treated as STAT (emergency) specimens in the laboratory. C) They should always be refrigerated. D) They should be rushed to the laboratory after collection.
T cells become immunocompetent where?
a. yellow bone marrow b. red bone marrow c. thymus d. thyroid
Which of the macromolecules below could be the structural parts of the cell, enzymes, or involved in cell movement or communication?
a. nucleic acids b. proteins c. lipids d. carbohydrates e. minerals