Geologists use the radioactive element to determine the age of organic remains, such as bone. a. argon-40 b. carbon-14 c. nitrogen-14 d. potassium-40

b

explanation:

mitosis

he uptake of drugs from the intestine is often strongly influenced by diffusion. for example, consider a water-insoluble steroid for treating inflammation that is solubilized in aggregates of detergent molecules, called micelles. these micelles, aggregates of 80 soap molecules, have a molecular weight of 24,000, a diameter of 2.6 nm, and a charge of -27. the positively charge ions (counterions) in this system are na".