Density is divided into which of the two factors?
A. Independent and dependent
B. Immigration and emigration
C. Biotic and abiotic
D. Fertility and fecundity

Which best describes red blood cells? a. they are colorless b. they protect against disease-carrying microorganisms c. they transport oxygen throughout the body d. they aid in blood clotting

Hummingbirds drink nectar from flowers, while robins eat plant seeds. what does this reduce?

How did the discovery of the rhesus factor affect society? o more patients died from having a transfusion with the wrong rhesus factor 0 new treatments during pregnancy could prevent harm to the developing child. o less donated blood could be used in the treatment of patients. the number of blood types was reduced by half