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

Biology & Microbiology

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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

Biology & Microbiology

Succession results from all of the following EXCEPT ____

a. facilitation b. growth and maturation rates c. inhibition d. interspecific differences in dispersal e. stasis

Biology & Microbiology

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.

Biology & Microbiology

Iodine serves as a mordant in the Gram stain

a. true b. false

Biology & Microbiology