What is the role of tRNA in translation?
A) It brings together two subunits of a ribosome.
B) It couples an amino acid with aminoacyl-tRNA synthetase.
C) It helps fold up the finished polypeptide chain.
D) It catalyzes peptidyl transferase activity.
E) It binds to an mRNA codon and carries the corresponding amino acid.
E
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Which of the following is a correct order of arrival in succession?
a. lichens and mosses cottonwood and willow trees Sitka spruce alders b. flowering plants shrubs lichens fir trees c. lichens and mosses alders and hemlock shrubs and grasses Douglas fir d. none of the choices
On a field trip, you observe red, tubular flowers along the trail. You will expect them to be pollinated by
A. bees. B. hummingbirds. C. moths. D. beetles. E. bats.
Describe the types of microorganisms you might expect to find near a hydrothermal vent at the bottom of the ocean, in descriptive terms (i.e. halotolerant, strict anaerobe, etc.). Be sure to include what you might imagine it's optimal temperature, oxygen concentrations, pH, and water/salt environment to be.
What will be an ideal response?
The dominant generation in the fungal life cycle is usually
A) unicellular. B) a sporophyte. C) diploid. D) polyploid. E) haploid.