In a well-fed state, brain cells use which one of the following compounds circulating in the blood stream almost exclusively as an energy source?

Which kingdom includes some organisms that have no nucleus and can live in an environment with an extremely high salt content

Hemoglobin is a proton that carries oxygen around the body what is hemoglobin made from

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