Plastics can best be described as being:
a. persistent.
b. biodegradable.
c. harmless to marine animals.
d. found only in areas where they are dumped.
e. recyclable.
A
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Autopolyploids contain __________ the number of
parental chromosomes and are usually artificially produced through the application of __________. a. triple; colchicine b. double; heat c. double; colchicine d. triple; heat e. double; radiation
The term clade most closely refers to:
a. a class. b. the binomial system of classification. c. a mechanism of horizontal gene transfer. d. a subspecies of organisms does not include a subgenus. e. a group of organisms that share common characteristics inherited from a common ancestor.
How many chromosomes are in a normal human karyotype?
a. 23 b. 44 c. 2 d. 46
A young man presents with severe respiratory distress. He is conscious, but confused, and smells of freshly cut grass. Auscultation of his breath sounds reveals coarse crackles in all lung fields, and he is coughing up copious secretions. This patient's clinical presentation is MOST consistent with exposure to:
A) chlorine. B) phosgene. C) V agent. D) soman or tabun.