Charles Darwin originally published the idea that all species have descended over time from common ancestors. This idea is known as evolution. Which of the following statements best categorized evolution? A
A scientific hypothesis that has not been researched.

B
An unproven observation about a small number of organisms.

C
A scientific fact that has not been modified since Darwin's time.

D
A scientific theory on change of over time that is supported by evidence.

As the human population grows, what happens to our natural-resource requirements? o they increase o they decrease o they do not change. they go in cycles

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 statement best compares aerobic and anaerobic respiration