List at least three statistical values often used to represent a sample
What will be an ideal response?
mean, standard deviation, standard error, variance
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Two frog populations (same species) living in two neighboring lakes sing slightly different courtship songs. Increased irrigation makes the land between the two lakes wetter, allowing frogs to expand their ranges to the area between the lakes
Females in both populations prefer loud frogs to quieter frogs, but do not distinguish between the two slightly different songs. Assuming that courtship song differences have a genetic basis, predict what will likely happen to the songs of the two frog populations. A) The songs will become more similar to each other. B) Males will become louder. C) Disruptive selection will cause the songs to differentiate even more. D) Genetic drift will cause the songs to differentiate even more. E) You cannot predict a change in the courtship songs at the two lakes.
Which of the following is NOT true of horizontal gene transfer?
A. It occurs when genes are transferred from parent to progeny. B. It increases genetic diversity for a species. C. It has important implications for inferring phylogeny. D. It can occur through endosymbiosis. E. It occurs commonly in bacteria.
How are the cells of a multicellular animal connected to the external environment? Briefly describe how nutrients and wastes are transferred from these cells to the external environment.
What will be an ideal response?
Indicate the order of the point mutations in the rII region.
Shown below are the maps of a series of rII- deletion strains (1–5). The deleted region is indicated as (......) and the intact region as ______. Note that strain 5 carries two different deletions.
1 ___________(...........)_______________
2 _________________(...........)_________
3 (.....................)_____________________
4 ________________________(................)
5 _____(..........)________________(.........)
rII- phage strains A-E have point mutations in the rII region. E.coli K(?) cells are coinfected with one phage that has a deletion and one phage that has a point mutation. The presence of wild-type progeny phage is assessed by the presence (+) or absence (o) of plaques.
A) CADBE
B) DEBAC
C) BADCE
D) ABDEC
E) CEADB
Additional question (answer with TRUE or FALSE) :
The test described here depends on recombination.