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Figure 34.4A
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Use the posterior pituitary function illustration above to answer the following question.
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Signals that stimulate the release of hormone molecules are carried along the component indicated by the letter ____.
A. A
B. B
C. C
D. D
E. E
Answer: B
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Cylindrical layers of meristem that run lengthwise through shoots and roots, and allow for thickening, are called ____
a. lateral meristems b. apical meristems c. ground meristem d. Procambium e. Protoderm
What is found within a small intestinal villus?
a. blood and lymph vessels b. enzymes c. secretory glands d. chyme e. smooth muscle
You are trying to determine the linkage map of a series of genes, X, Y, and Z, from Caenorhabditis elegans, a nematode worm commonly used in scientific research. From doing several crossover experiments, you know that the recombination frequency between
X and Y is 11.5%, between Y and Z is 13%, and between X and Z is 25%. What is a possible sequence of these genes? A) X-Z-Y B) Y-Z-X C) Z-X-Y D) X-Y-Z
We would use which of the following terms for a situation in which the derived trait has arisen recently and appears in only one of the two most related species or populations while the two most distantly related groups share the same trait?
a. homology c. homoplasy b. synapomorphy d. symplesiomorphy