Which of the following describes a difference between prokaryotes and archaea?
Prokaryotes have cell walls composed of peptidoglycan, whereas archaea do not.
Archaea can live only in water, and prokaryotes can live anywhere.
Prokaryotes lack nuclei, whereas archaea do not.
Prokaryotes reproduce asexually, whereas archaea reproduce sexually.
Prokaryotes have cell walls composed of peptidoglycan, whereas archaea do not.
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Which of the following animals would have the highest basal metabolic rate?
A. elephant B. lion C. eagle D. frog E. bumblebee
Which of the following determines the force production in muscle contraction?
a. the amount of acetylcholine released into the synapse b. the speed of the acetylcholinesterase acting to break down acetylcholine c. the number of myofibers receiving an action potential from the neuron d. the length of the sarcomeres involved in the contraction
Which of the following suggested additional experiments would test whether or not prairie dogs might be a keystone species?
a. Remove the deer mice. b. Remove the mesquite. c. Re-establish the hawk population. d. Re-establish the prairie dog population.
In which part of the molecule does tRNA pair with mRNA?
A) rRNA B) codon C) anticodon D) gene