Which of the following allows cells to recognize each other?
a. Glycolipids
b. Protein channels
c. Carbohydrates
d. Cholesterol
c. Carbohydrates
Carbohydrates allow cells to recognize each other by forming specialized sites on the cell surface, along with peripheral proteins.
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The exhalation of air from human lungs is driven by _____
A) a decrease in the volume of the thoracic cavity B) a decrease in the residual volume of the lungs C) the contraction of the diaphragm D) the closure of the epiglottis E) the expansion of the rib cage
Unlike fish, lancelets as a adults do not have
a. a dorsal, hollow nerve cord. b. gill slits. c. a brain. d. a tail extending beyond the anus. e. more than one of these.
The mitotic spindle is composed of ______________ and grows from the _______________ toward the center of the cell.
Fill in the blank(s) with the appropriate word(s).
Most of the tallgrass prairies have been converted ____.
A. to grazing lands B. for citrus production C. to homesteads D. to croplands E. to vineyards