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.
B
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Do you believe humans are still evolving? If not, why? If yes, explain in what ways humans may be evolving.
What will be an ideal response?
Most individuals with histoplasmosis exhibit a hypersensitive state that can be demonstrated by the histoplasmin skin test.
Answer the following statement true (T) or false (F)
Restriction enzymes
a. often produce staggered cuts in DNA that are useful in splicing genes. b. are like most enzymes in that they are very specific in their action. c. are natural defense mechanisms evolved in bacteria to cut apart short sequences of DNA. d. are used along with ligase and plasmids to achieve genetic recombination. e. all of these
The basic structure of chromatin has sometimes been referred to as beads on a string of DNA. These beads are called
a. chromosomes. b. chromatids. c. supercoils. d. interphases. e. nucleosomes.