An instrument that measures lung volumes is a
a. caliper.
b. spirometer.
c. barometer.
d. stethoscope.
d
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Nearly everything we use requires both ____ and energy
Fill in the blank with the appropriate word.
The ultimate fate of the energy used by organisms is to
a. be converted into heat. b. be converted into offspring. c. be recycled repeatedly without loss. d. be used as metabolic heat. e. move into the environment by conduction.
In what sense is the genetic code nearly universal?
a. All organisms on Earth share in common approximately 85 percent of their DNA sequence. b. The genetic code has its origin in meteorites from distant regions of interstellar space. c. Nearly every possible combination of codons occurs in each organism’s chromosomes. d. Specific mRNA sequences generate the same proteins in nearly all known organisms.
Which of the following defense systems would be involved in eliminating virally-infected cells?
a. Phagocytosis b. Humoral immunity c. T lymphocytes d. Complement system