The bacteria Escherichia coli (E. coli) live in the intestines of humans and make vitamins such as vitamin K and B-complex vitamins. Which would best describe
the relationship between E. coli and humans?
A. The E. coli benefit and humans are harmed.
B. There is only a benefit for the humans. Got it incorrect on the first try.
C. There is only a benefit for the E. coli.
D. The E. coli and humans both benefit.

Diagram of the evolution of land plants?

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.

The cretaceous period spanned the time interval between and 65 million years ago. 250 million 144 million 75 million 200 million