Which type of mutation is possible thanks to the redundant nature of the genetic code?
A) silent
B) missense
C) nonsense
D) frameshift
E) splice site
A
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You are a forester charged with increasing productivity in a South American forest newly planted with pines from Oregon
You believe that the southern forest lacks the fungal diversity needed by the North American pines, and that this lack of fungi is affecting the pines' productivity, but you have no evidence to support your ideas. To count how many fungal species were present in the Oregon forest, which methodology would you choose? A) Count all the plant species and multiply by six, as David Hawksworth did when determining the ratio of fungal to plant species in England. B) Collect all the fruiting structures (mushrooms, morels, etc.) found above ground. C) Do direct sequencing on representative soil samples from across the forest. D) Expose the trees to radiolabeled carbon dioxide and then collect the soil samples with the greatest radioactivity and do direct sequencing.
Another name for programmed cell death is
A) necrosis. B) perforation. C) apoptosis. D) cellular degradation.
Homeotic genes activate other genes that determine the ____________ of each segment
A. segment B. parasegment C. morphological characteristics D. zygotic
What term refers to the series of events that begins with an infection of one cell and ends with the release of progeny phages from broken or open cells?
a. the lysogenic cycle b. the lytic cycle c. the citric acid cycle d. the Krebs cycle