In the motility test medium, the growth of bacteria is detected by the reduction of which dye which has a reddish color?
A. Neutral red
B. Methyl red
C. Tetrazolium salt (TTC)
D. Phenol red
E. Eosin Y dye
Ans: C. Tetrazolium salt (TTC)
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cephalization refers to the trend for animals with more complex body types to
A. concentrate nervous tissue in the anterior (head) end of the animal. B. become bilaterally symmetrical. C. develop a brain with clear divisions between "gray" and "white" matter. D. develop a segmental organization to the nervous system. E. concentrate sensory organs in the anterior end of the animal.
Why does sweating cool your skin on a hot, dry day but make you feel warmer on a hot, humid day?
What will be an ideal response?
Write out the growth equation including the following factors: natality, mortality, immigration, and
emigration. Provide a one-sentence explanation for the impact of each of these factors on the population growth rate. What will be an ideal response?
A seed that lands in the forest soil is homozygous mutant for the CONSTANS (CO) gene, and as a result does not produce any functional CONSTANS protein. What do you predict will happen during the development of this seed?
A. It will germinate and grow vegetatively. If it is from a photoperiodic species, it will fail to produce flowers. B. It will fail to germinate. C. It will germinate and grow vegetatively, but will never produce flowers. D. It will germinate and grow vegetatively, and then it will produce flowers earlier than wildtype.