A doctor reports a single occurrence of a disease to the Centers for Disease Control as a disease outbreak. Which of these factors most likely led to the doctor's actions? A.
The disease has been absent from the population for a long time.
B.
The disease causes symptoms that can last from 7 to 14 days.
C.
The disease causes a variety of symptoms, including fever and nausea.
D.
The disease is typically more common in children than it is in adults.

Someone me with this: a mineral' is determined by its actomic structure.

How can a geological time scale best be reconstructed? a) comparing vestigial structures in living species b) comparing homologous structures in living species c) examining homologous structures in fossil remains d) examining the written records of scientists from past cultures

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.