Mrs. james is 7 months pregnant and states that she has developed a problem with constipation. she eats a well-balanced diet and is usually regular. you should explain that constipation is common during pregnancy due to changes in the colorectal areas, such as:

Which of the following particles always has a positive charge? a. electronb. neutron c. proton d. ion

9. the history of life on earth is recorded in

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.