What do synaptic signaling and paracrine signaling have in common?
A. Cells release a signal that affects it and neighboring cells.
B. Cells release a signal that affects cells at long distances.
C. Cells release a signal through gap junctions to affect neighboring cells.
D. Cells bind a membrane bound signal on a neighboring cell.
E. Cells release a signal that affects neighboring cells.
E. Cells release a signal that affects neighboring cells.
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Why were the slime molds and water molds once considered to be fungi?
A. Early identification methods focused on appearances rather than biochemical characteristics. B. Early identification methods focused on appearances rather than genetic similarities/differences. C. They ARE fungi. D. They possess the same material in their cell walls (chitin) that fungi possess.
Which of the following sequence of events of fertilization is in the proper order?
A. acrosomal reaction, binding of sperm to egg membrane, fast block to polyspermy, increase in egg cytosolic calcium, and then the slow block to polyspermy B. binding of sperm to egg membrane, acrosomal reaction, fast block to polyspermy, slow block to polyspermy, and then an increase in egg cytosolic calcium C. binding of sperm to egg membrane, acrosomal reaction, fast block to polyspermy, increase in egg cytosolic calcium, and then the slow block to polyspermy D. acrosomal reaction, fast block to polyspermy, binding of sperm to egg membrane, increase in egg cytosolic calcium, and then the slow block to polyspermy E. acrosomal reaction, fast block to polyspermy, binding of sperm to egg membrane, slow block to polyspermy, and then an increase in egg cytosolic calcium
Which of the following is currently the largest group of cultured Archaea?
A. Extreme halophiles B. Methanogens C. Sulfate reducers D. Extreme thermophiles
Which of the following ratio is not likely to occur in crosses (F2 ) when one is dealing with two interacting, epistatic gene pairs?
A) 3:1 B) 9:3:4 C) 9:7 D) 12:3:1 E) 15:1