A __________________ is a diagram that depicts the exchange of carbon between organisms, whereas a _______________ is a diagram that depicts the transfer of energy between organisms
A. trophic pyramid; food web
B. food web; trophic pyramid
C. food web; circuit
D. trophic pyramid; circuit
B
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Self-assembly has been utilized or potentially may be used for all of the following applications except
A) nanotechnology. B) electrical conductivity. C) biosensors. D) drug delivery systems. E) All of the above are examples.
A 26-year-old woman has an odorous vaginal discharge, lower abdominal pain, and difficulty urinating. Vaginal secretions are collected and sent to the laboratory for examination 3 hours af-ter collection. No motile organisms are observed on the wet preparation; however, T. vaginalis is suspected. Which one of the following statements explains this discrepancy?
a. The infection is most likely bacterial; therefore a Gram stain should have been performed. b. The specimen should have been refrige-rated before examination; consequently, the organism was compromised. c. The time between collection and the mi-croscopic examination was prolonged, resulting in loss of motility. d. No discrepancy is present; this organism in nonmotile.
When two alleles of the same gene are identical, the individual carrying those alleles is said to be ____
a. dominant b. heterozygous c. recessive d. genotypical
e. homozygousWhat signaling pathway commonly makes use of a G protein to transduce the signal?
A. channel-linked receptor pathways B. receptor tyrosine kinase pathways C. steroid hormone receptor pathways