All arthropods _____. 1. undergo complete metamorphose 2. have jointed appendages 3. molt 4. have segmented bodies 5. have an exoskeleton or cuticle
A) 1, 2, and 4
B) 3 and 5
C) 2, 3, 4, 5
D) 1, 4, 5
C
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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
Succession results from all of the following EXCEPT ____
a. facilitation b. growth and maturation rates c. inhibition d. interspecific differences in dispersal e. stasis
Herpes simplex-1
A. is exclusive to oral mucosa. B. is cleared by praziquantel. C. confers immunity to herpes simplex 2. D. is exclusive to genitourinary tract. E. None of the choices is correct.
Iodine serves as a mordant in the Gram stain
a. true b. false