__________ are chordates with a braincase of cartilage or bone. Fill in the blank(s) with the appropriate word(s)
Craniates
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No eukaryotic organisms have been shown to fix nitrogen without the aid of prokaryotes
Indicate whether this statement is TRUE or FALSE.
The above figure shows areas of referred pain
that indicate an internal organ is damaged. Which letter corresponds to heart damage? a. A b. B c. C d. D e. none of these
Bacterial flagella ____
a. are smaller and simpler than eukaryotic flagella b. consist of a straight fiber of protein c. are found in all motile bacteria d. are powered by a gradient of calcium ions e. contain microtubules
Signals from the parasympathetic nervous system
cause which of the following? a. increase in blood pressure b. increase in pulse rate c. increase in digestive activities d. increase in blood sugar level e. increase in metabolic rate