Heart inflammation, or ________ , produces an irregular heart rhythm that leads to dizzy spells and other symptoms.

a. rheumatic fever
b. pericarditis
c. Borrelia burgdorferi
d. myocarditis
e. endocarditis


d. myocarditis

Biology & Microbiology

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Natural selection operates directly on

(a) the genotype. (b) individual alleles. (c) the phenotype. (d) color only.

Biology & Microbiology

During which phase of the cell cycle do chromosomes separate and move toward opposite poles?

a. prophase b. metaphase c. anaphase d. telophase

Biology & Microbiology

Hawthorn maggot flies that breed on native hawthorns or introduced European apples can mate in the lab, but rarely mate in the wild. This is an example of _____ reproductive isolation.

A. postzygotic B. prezygotic C. allopatric D. sympatric E. outgroup

Biology & Microbiology

Bacterial RNA polymerase binds to the ________

A) operator B) proto-oncogene C) regulatory gene D) promoter

Biology & Microbiology