An atom has 20 electrons and 20 neutrons. What is the mass of this atom?
A. 10
B. 20
C. 40
D. 80
C
Biology & Microbiology
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Premature babies that are born as early as ___ weeks after fertilization can survive
A. 22 B. 13 C. 17 D. 27 E. 30
Biology & Microbiology
Large, flightless birds called __________ were exterminated from New Zealand by Maori natives before Europeans arrived.
A) dugongs B) dodos C) moas D) boas
Biology & Microbiology
The ascomycetes are named for their characteristic reproductive structure called a(n) ________.
A. ascocarp B. hypha C. thallus D. ascus
Biology & Microbiology
Serological tests known as ________ detect the formation of antibody-antigen complexes (immune complexes).
A. immunoblot tests B. ELISAs C. neutralization tests D. direct fluorescent antibody tests E. precipitation tests
Biology & Microbiology