What is the significance of having specialized epithelium and smooth muscle in the urinary bladder?
a. It helps reabsorb water.
b. It helps reabsorb salts.
c. It permits the diffusion of gases.
d. It is capable of shrinkage and stretching.
e. It protects the bladder from nitrogenous wastes.
d
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True or false:
_____ The nervous systems of all animals are organized into peripheral and central components. _____ The PNS consists only of sensory neurons. _____ All neurons have either a sensory or motor function. _____ All neuronal cell bodies are either in the brain or spinal cord. _____ All nervous system responses involve input from the brain. _____ The organization of the human nervous system is completely different from that of other vertebrates. What will be an ideal response?
Sponges avoid predators by:
a. seeking sheltered locations. b. having spicules. c. producing toxins. d. both b and c e. a and b only.
Which of the following represents acclimation?
A) Deeper beaks evolve in a population. B) Marine lionfish are able to tolerate freshwater in estuaries. C) Tropical trees grow taller than temperate ones to compete for light. D) Poisonous animals are brightly colored to ward off predators.
A scientist is studying several areas along an elevation gradient. Her study involves prescribed burns (purposefully set, low-intensity fires) in the different areas, followed by a comparison of the type and abundance of organisms that colonize them over the next ten years. What scale best describes her study?
A. Population ecology B. Physiological ecology C. Ecosystem ecology D. Organismal ecology E. Community ecology