A chemical that delivers amino acids one at a time in the ordered sequence specified by the mRNA strand is called ________
A) DNA
B) tRNA
C) rRNA
D) mRNA
B
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Microorganisms that live in severe habitats, such as very hot, acidic, or salty environments, are called ________.
A. halophiles B. thermophiles C. extremophiles D. barophiles E. psychrophiles
The distal tubule is indicated by
a. A. b. B. c. C. d. D. e. none of these.
As part of your research project, you travel to an island to learn more about the habitats and relationships of flies, spiders, and centipedes. You and your assistant plot out five different areas on the island and count the numbers of flies, spiders, and centipedes living in each plot. Your results show the following: Plot Flies Spiders Centipedes1300254242617103147152147397805791393The hypothesis that closely matches the data provided is:
A. herbivorous insects survive best on islands where spiders and centipedes live. B. herbivorous insects and spider populations are decreased by centipedes. C. herbivorous insects feed on spiders and centipedes. D. spiders are the top predators on all islands.
A problem may result from allowing the slides to dry during the gram staining process
a. true b. false