The longest portion of the large intestine region is known as the _____________.
A. lumen
B. appendix
C. rectum
D. cecum
E. colon
Answer: E
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Each skeletal muscle cell constitutes a single
A. motor unit. B. muscle fiber. C. sarcolemma. D. myofibril. E. sarcomere.
In land plants what % of the water transported by the xylem is used for metabolism?
a. 66% b. 85% c. 2% d. 32% e. 90%
Which of the following will denature an enzyme?
a. temperature b. humidity c. barometric pressure d. oxygen availability
Which of the following is NOT a characteristic of a morphogen?
A. morphogen gradients are always established in the oocyte B. morphogens can be distributed asymmetrically throughout a cell C. a morphogen will only elicit effects in areas where it is at a high enough concentration D. morphogens can be secreted to act on neighboring cells E. morphogens can cause cell death