Which type of sensory receptors becomes more sensitive when damaged tissues produce prostaglandins?
A) deep pressure receptors
B) photoreceptors
C) pain receptors
D) temperature receptors
Answer: C
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A student encounters an animal embryo at the eight-cell stage. The four smaller cells that comprise one hemisphere of the embryo seem to be rotated 45 degrees and to lie in the grooves between larger, underlying cells. If we were to separate these eight cells and attempt to culture them individually, then what is most likely to happen?
Which of the following is TRUE regarding plasmids?
A. Plasmids are small, usually a few thousand to ten thousand base pairs. B. Plasmids are linear. C. Plasmids are contained within the bacterial chromosome. D. Plasmids are rarely found in prokaryotes. E. Plasmids dominate in eukaryotes.
Answer the following questions true (T) or false (F)
1. Dikaryotic cells of a fungus contain diploid nuclei. 2. Spores are reproductive cells of a fungus. 3. Nearly all fungi reproduce using mushrooms as their reproductive structure.
Which of the following would you classify as a case of cultural evolution?
a. The males of brood parasitic birds (e.g., cuckoos) use the calls of their father after they have been raised in the nest of a host. b. The specific arrangement of keys on a keyboard of a computer that has been steadily gaining market share during the past decade. c. A parent offspring regression in catbirds yields a linear slope of 0.9 when the ability to acquire new calls is plotted. d. The cases made by the larvae of the same caddisfly species differ between different sections of the stream depending on the availability of construction materials.