Which one of the following events associated with the transmission of an impulse across a synapse occurs last?
A) Action potential arrives at an axon bulb.
B) Neurotransmitter is released into the synaptic cleft.
C) Chemically gated channels for sodium open.
D) Calcium diffuses into an axon bulb.
E) Neurotransmitter binds to receptors on the postsynaptic membrane.
C
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Which of these is not a function of the root cap?
A. gravity perception B. rapid cell division C. protection of the root tip D. pushing away soil particles as the root grows E. releasing a slimy lubricant fluid
Some of the functions of the eukaryotic organelles are performed in bacteria by the:
A. capsule. B. cell wall. C. flagella/cilia. D. plasma membrane. E. nucleoid area.
________ is when the fertility plasmid merges with the bacterial cell's chromosome and ceases to be an independent plasmid in the cytoplasm
A) Transformation B) Transfection C) Transduction D) Recombination E) Conjugation
To help avoid a waterborne infection, what would you recommend to a traveler going to South America?
a. vaccination b. bring chlorine with you c. only consume/use bottled water d. only consume canned foods and beverages