Anoxygenic phototrophs may or may not be autotrophs
Indicate whether the statement is true or false.
Answer: TRUE
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Which of the following is not a response to
rising body temperature? a. Increased rate of breathing. b. Decreased secretion of hormones that stimulate activity. c. More sweat. d. Blood flow to skin reduced. e. Increased rate of breathing.
In which of the following would the most highly conserved sequences of nuclei acids be located?
(A) Structually critical regions of a polypeptide such as an active site region (B) The intron regions of pre-mRNA sequences (C) Ribosomal RNA sequences (D) Bacterial genes conferring antibiotic resistance
Metal ions are useful to organisms in the ________ form.
A. soluble B. reduced C. insoluble D. oxidized E. oxidized and insoluble
Place the events in the transmission of an action potential in the correct order:1. An action potential begins in the receiving neuron. 2. Neurotransmitters are released into the synaptic cleft. 3. An action potential arrives at an axon terminal. 4. Calcium ions enter the axon terminal.5. Sodium ions diffuse into the receiving neuron.6. Synaptic vesicles fuse with the plasma membrane.7. Neurotransmitter molecules bind to the membrane of the receiving neuron.
A. 3,4,6,2,7,5,1 B. 7,6,5,3,4,2,1 C. 3,5,6,2,7,4,1 D. 2,3,6,7,4,5,1 E. 1,2,6,7,4,3,5