How are the respiratory and circulatory systems similar?

both systems provide glucose and other substances to cells.

both systems regulate blood flow throughout the body.

both systems remove carbon dioxide from the body.

both systems send messages to the nervous system for breathing.

Abiologist counts the number of rabbits in a population each year and observes a decrease in population. since the coyote population has exploded, the biologist concludes that the coyote population has had a negative interaction with the rabbit population. which describes the biologist’s actions? a.) experimentationb.) inferencec.) observationd.) interacting