The two major ventral body cavities of a fetal pig are the
(a) thoracic and pleural.
(b) thoracic and pericardial.
(c) abdominopelvic and thoracic.
(d) abdominopelvic and pericardial.
(c) abdominopelvic and thoracic.
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What is the function of the poly A tail?
A. The poly A tail is required for the termination of translation, it is recognized by the release factor proteins B. The poly A tail is required for the mRNA to resume its double helical structure C. The poly A tail increases mRNA stability in eukaryotes. D. The poly A tail increases mRNA stability in prokaryotes. E. The poly A tail serves as a termination sequence for RNA polymerase III.
The enzyme that synthesizes messenger RNA from a DNA template is
A) DNA polymerase. B) RNA polymerase. C) reverse transcriptase. D) ligase.
Figure 40.2
In the above illustration of fluid regulation in a planarian, the letter "A" represents which of the following?
A. Nucleus of the flame cell B. Small capillaries that allow water to freely diffuse into the planarian C. Sexual reproductive organ D. Cilia to draw fluid into the planarian E. Funnel to collect fluid
The interactions that occur between water molecules are called _____ bonds.
A) hydrogen B) nonpolar covalent C) polar covalent D) ionic E) water