Which item, A, B, or C, is a gated ion channel in the postsynaptic membrane?
3
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In positive feedback homeostatic mechanisms
(a) the response reverses the change. (b) the response intensifies the change. (c) the response occurs before the change. (d) none of the above answers occurs.
Actinoplanetes that dwell in the soil play an important role in plant and animal decomposition.
Answer the following statement true (T) or false (F)
Xylem and phloem are examples of what type of plant tissue?
a. vascular tissue b. ground tissue c. protoderm d. meristem
Bilateria are characterized by
A. a plane of symmetry that forms mirror images around any plane through the longitudinal midline of the body. B. a plane of symmetry around a transverse plane across the center of the body so that the front and back halves are mirror images. C. a plane of symmetry that forms mirror images around a vertical plane in the midline. D. a plane of symmetry that forms mirror images around an oblique plane in the midline. E. a plane of symmetry that forms mirror images around a horizontal plane in the midline.