Which of the following statements is NOT true about fluid feeders?
a. They may have long tongues to effectively extract nectar from plants.
b. They may gather organic material from soil located nearby.
c. They may have piercing mouth parts to obtain blood from a host.
d. They may secrete enzymes on a food source and consume it once it is liquefied.
e. They may inject anticoagulants into a host to inhibit blood from clotting.
B
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Which of the following is the most important contribution of molecular phylogenetics?
a. the discovery of rRNA b. the reanalysis of the morphology of Amborella trichopoda c. the reorganization of living systems from five to six Kingdoms d. the reorganization of living systems into three domains e. the realization that morphological characters are not representative of phylogenetic relationships
Which of the following is not one of the periods of the Paleozoic era?
1.Cambrian 2.Carboniferous 3.Jurassic 4.Permian
A diploid cell has how many versions of each gene?
a. 1 b. 2 c. 4 d. 8 e. 16
Which of the following statements about nosocomial infections is FALSE?
A) They occur in compromised patients. B) They may be caused by opportunists. C) They may be caused by drug-resistant bacteria. D) They may be caused by normal microbiota. E) The patient was infected before hospitalization.