What evolutionary advances are demonstrated in the nervous systems of bilaterally symmetrical animals? What will be an ideal response?
Concepts to Consider: 1) increased number of nerve cells; 2) nerve cells become
concentrated in masses, such as ganglia and brains; 3) specialization of function--requires
afferent and efferent nerves and effectors; 4) more complex synaptic contacts and association
neurons--allows greater precision and integration of messages; 5) cephalization--
concentration of sense organs at front end allows more rapid response to predators or prey.
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A mycelium is best defined as
a. a mushroom. b. a mass of hyphae. c. an association between a fungus and a plant root. d. a reproductive structure of a fungus. e. a fungal cell.
Which of the following is NOT a characteristic of the acquired immune response?
a. memory b. specificity c. ability to respond to millions of different antigens d. ability to distinguish self from nonself e. adaptive
Oral infections with herpes simplex virus 1 can lie dormant in nerve cells for years, and when a patient becomes stressed, the virus is released, forming cold sores on the lips. Where will the virus be while dormant in the nerve cell?
a. Floating in the nerve cell cytoplasm b. Integrated in the nerve cell chromosomes c. In the nerve cell membrane d. Floating outside of the nerve cell, waiting to reinfect it e. In the blood
According to the intermediate disturbance
hypothesis, a. species richness becomes greatest in between disturbances of moderate intensity or frequency. b. a disturbance is necessary during succession in order to stabilize the community. c. community succession is highly predictable. d. competition and other species interactions are the most important factors in shaping community structure. e. a community reverts to a climax state after a disturbance.