In which type of arrhythmia do the atria contract very quickly and "out of sync" with the rest of the heart because of an error in the heart's electrical system?

A. atrial fibrillation
B. atrial flutter
C. ventricular tachycardia
D. Obradyarrhythmia

Based on the observation that only male crickets produce a song, you hypothesize that a male's song is a form of communication to potential mates. you set up a simple experiment to test this hypothesis. in the laboratory, you place a male snowy tree cricket in enclosure a, which is adjacent to enclosureb. in enclosure b, you place other insects, one at a time, and observe their responses to the male's song. the enclosures are designed so that the two insects being tested cannot see or smell each other, but sound is transmitted from enclosure a to enclosureb.

Hydroelectric uses moving water to do work such as grinding grains in a mill true or false

In a village where the proportion of individuals who are susceptible to malaria is .70 and population is at hardy-weinberg equilibrium what population is heterozygous hba/hbs