Sloths have less muscle than other mammals their size in order to
a. conserve energy
b. maintain a lower body weight
c. digest their food faster
d. maintain a higher body temperature

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.

Which of the following would you not find in a bacterial cell? dna cell membrane golgi apparatus ribosomes

Which nutrient tends to cycle within a single ecosystem?