A sensory receptor is often a modified version of what type of cell?
Ans: neurons
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Pecking behavior in young herring gulls is triggered primarily by ____
a. hunger b. the shape of the parent gull's head c. a red spot on the bill of the parent d. the overall body silhouette of the parent bird e. presence of predators
Bacterial cell walls that are resistant to drying contain
A) carbohydrates. B) amino acids. C) lipopolysaccharide. D) tubulin. E) waxes.
In vertebrates, the dorsal nerve cord evolved into a brain and spinal cord, which together constitute which of the following?
A. Central nervous system B. Brain C. Cephalization D. Peripheral nervous system E. Autonomous nervous system
The three-dimensional shape of a protein is determined by the ____ and the results of chemical modifications and other processing events
a. interaction of R groups b. interaction with other polypeptide chains c. amino acid sequence d. bonds formed with other proteins e. initiation complex