Why does the access to water a source of conflict

Previous pagenext pagepage 3 of 10question 3 (1 point)which of the following consist of cells that do not have a nucleus? of the above

Drag each tile to the correct box. the body monitors the levels of oxygen in the blood to regulate breathing. isabel is running in a marathon and is near the finish line. she feels out of breath. how will her nervous system work to generate a reaction? arrange the tiles in chronological order. isabel's breathing rate increases. sensory receptors in the arteries detect low oxygen levels. the brain sends signals through motor neurons. sensory neurons generate an impulse. the central nervous system relays an impulse to certain brain regions.

In general, characteristics that an organism survive and reproduce become more common in a population over time. what mechanism of evolution cause this change?