The chart below shows several species found in a pond ecosystem and the pH levels in which the species can survive. The norral pH of the pond is 6.5.
If the pH of the pond fell to 5.5 due to acid rain, which of the species shown in the chart would die?

What controls activities within a eukaryotic cell?

Chloroplasts and bacteria are in size. a. similar b. at different ends of the size range c. exactly the same d. none of these

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.