Which change describes a demographic transition?
Question 19 options:

a population moves from a high birthrate and death rate to a high birthrate and low death rate

a population moves from a high birthrate and low death rate to a low birthrate and death rate

a population moves from a low birthrate and death rate to a low birthrate and high death rate

a population moves from a high birthrate and death rate to a low birthrate and low death rate

The zone, which exists from a depth of 0 to 600 feet, is home to the majority of ocean life.

Which of these is an example of land degradation? a. containers designed to store pollutants leak. b. fertilizers provide too many nutrients to crops. c. garbage is buried so the land can be reclaimed later. d. a drought kills all the plants in an area, leaving bare land

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.