Which are structures formed from the neural crest? (Check all that apply.)A) A gill chamber of primitive chordatesB) BlastoporesC) Sensory neurons of the dorsal root gangliaD) Schwann cellsE) Olfactory and hearing organs
What will be an ideal response?
A, C, D, E
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The ________ is the most prevalent form of a gene in a population.
Fill in the blank(s) with the appropriate word(s).
The most immediate result of destruction of a cell's ribosomes would be that
A. material would not cross the cell membrane. B. holes would appear in the capsule. C. protein synthesis would stop. D. glycogen inclusions would form. E. the chromosome would unravel.
What role does wind play in desertification?
a. Wind disperses seeds. b. Wind blows away topsoil. c. Wind impedes grass growth. d. Wind damages mature grasses of grasslands. e. Wind causes drought.
How does brightfield microscopy allow images to be visualized?
A) Specimens are illuminated with white light. B) Electrons strike the specimen being examined. C) Specimens are fixed and have bright fluorescent molecules attached to them. D) Specimens are illuminated with blue light to visualize internal features of cells smaller than 100 nm. E) Specimens are viewed under phased light to improve magnification.