Which statement is NOT true about the development of an action potential?
Select one:
a. There is a rapid change in polarity from about -65 mV to about +40 mV.
b. It requires two types of gated channels.
c. The action potential ends when the polarity across the membrane reaches +40 mV.
d. Depolarization occurs when sodium gates open and allow sodium ions to enter the cell.
e. Potassium gates open after the sodium gates and allow potassium ions to leave the cell.
c. The action potential ends when the polarity across the membrane reaches +40 mV.
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_______ inject their genetic material into a cell, leaving their capsid in the extracellular space.
a. RNA viruses b. DNA viruses c. Virions d. Bacteriophages
Features that are typical of K-selected organisms include all of the following except:a
late reproduction. b. slow development. c. a low reproductive rate. d. large body size. e. little parental care of offspring.
?
Figure 30.18C
Which plant hormone listed below is responsible for the symbiotic relationship shown in the accompanying figure?
A. auxin B. gibberellin C. cytokinin D. jasmonic acid E. abscisic acid
Of the three diseases caused by Yersinia pestis, only (bubonic/black/pneumonic) plague is communicable between humans.
Fill in the blank(s) with the appropriate word(s).