A common characteristic of Choanoflagellida is
A. a single, unique mitochondria.
B. space beneath the plasma membrane.
C. silica covering.
D. funnel-shaped, contractile collar.
E. presence of a plasmodium.
D. funnel-shaped, contractile collar.
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Which of the following is NOT accurate about the shoot apical meristem?
A. Its central zone maintains actively dividing cells. B. It gives rise to stems, leaves, and flowers. C. Its peripheral zone contains dividing and differentiating cells. D. It is found in the central region of the seedling. E. It has an organizing center that preserves the correct number of stem cells.
Which cells produce pepsinogen in the stomach?
a. brush border cells b. chief cells c. choanocytes d. parietal cells e. villi
Which of the following glucose transporters has properties that facilitate glucose transport out of human liver cells to maintain blood sugar level homeostasis?
A) GLUT1 B) GLUT2 C) GLUT3 D) GLUT4 E) GLUT5
Where do human nerve cells remain once they become mature and exit the cell cycle?
a. in G2 b. in G1 c. in G0 d. in S phase