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