What is one concern with the use of genetically-engineered, herbicide-tolerant crops?
a. decreased yields
b. potential allergic reactions
c. transfer of herbicide resistance to weeds
d. loss of genetic diversity
e. expense of using herbicides
c
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How many nuclear envelopes form during mitosis and meiosis?
a. Two nuclear envelopes form during both mitosis and meiosis. b. Two nuclear envelopes form during mitosis and four during meiosis. c. Two nuclear envelopes form during mitosis and six during meiosis. d. Four nuclear envelopes form during both mitosis and meiosis.
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 ______.
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
Protein production occurs at which TWO organelles?
What will be an ideal response?
The deadliest, most contagious microbes are studied under conditions of (BSL-4/BSL-3/BSL-2/BSL-1) containment.
Fill in the blank(s) with the appropriate word(s).