Joints are found only in the appendicular skeleton.
a. true
b. false
Answer: b. false
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Which of the following is incorrectly paired?
A) intrauterine insemination; donated sperm is placed in the woman's reproductive tract B) in vitro fertilization; fertilization occurs in a laboratory dish C) ICSI; DNA from an immobile sperm is injected into an oocyte D) GIFT; fertilization occurs in a laboratory dish
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
Which is (are) the principal substance(s) that
regulate(s) thigmotropism? a. auxin and ethylene b. gibberellin c. abscisic acid d. salicylic acid e. none of these
Which of the following statements is false?
A) There are more than 60 different kinds of amino acids present in cells. B) The R group of amino acids differs from one amino acid to another. C) Only around 20 amino acids are used in protein synthesis. D) Equal amounts of D- and L-amino acids are found in cells. E) An amino acid has an N-terminus, a C-terminus, and an R group.