Differences in chromosomal arrangements (such as inversions and translocations) between species can result in postzygotic isolation because:
a. hybrid zygotes die early.
b. hybrids are inviable.
c. hybrids are sterile.
d. hybrids are behaviorally isolated from their parents.
C
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Which of the following is an intermediate in the reaction that forms Ala-tRNA?
A. Alanyl-ATP B. Alanyl-ADP C. Alanyl-PPi D. Alanyl-AMP
Which of the following mammals is NOT an
anthropoid?
a. orangutan b. lemur c. spider monkey d. gorilla e. human
In general, what two methods are used to grow bacteria in the laboratory?
What will be an ideal response?
In the figure below, the cell is _____ to the solution. If the membrane is permeable to water, but not to solutes, net movement of water will be _____ the cell. (Note that the units mM represent the total concentration of solute in the solution.) Inside the cell is 285 mM and outside the cell is 500 mM.
a) hypotonic; out of b) hypertonic: out of c) hypotonic: into d) hypertonic: into