The sounds produced by different species of frogs
A. are unique to each species.
B. are used to attract mates.
C. are instinctive.
D. All of these answers are true.
D. All of these answers are true.
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Which of the following organelles possess DNA separate from nuclear DNA that can be used to trace genealogies of humans?
a. ribosomes b. chloroplasts c. mitochondria d. lysosomes
Muscles are connected to bones by ____
a. ligaments b. epithelium c. tendons d. joints e. bones
Dinoflagellates that exist endosymbiotically within a variety of marine invertebrates are called ________.
A. endotrophic B. endoflagellates C. parasites D. zooxanthellae
What happens if a neuron is stimulated enough midway in an axon to trigger an action potential?
A) The nerve impulse would go both directions from the stimulus point, but only the axon end could transfer the message trough neurotransmitters to another neuron. B) Since neuron transmission is one-way, the nerve impulse would only be transmitted to the end of the axon and then through neurotransmitters to the next neuron. C) The nerve impulse could not be transmitted because it must be initiated at the dendrite end of a neuron. D) The nerve impulse would go both directions and the dendrite end would be stimulated to send a second message through this neuron.