which gas passes from the air sacs in the lungs into the blood capillaries?not sure if carbon dioxide or oxygen pls i need help fast !!

As a small change in a person's dna can cause a genetic disorder

People with one sickle cell allele are not likely to get malaria. what is this an example of?

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