Which statements about radiocarbon dating are true? select all that apply.
a. it's useful for dating all inorganic things.
b. it's useful for dating some organic (once-living) things.
c. it's useful for dating some materials that are millions of years old.
d. it's useful for dating some materials that are thousands of years old.

3points hurry! what is the relationship between biotechnology, sharkskin, and disease resistance? bioengineers have developed an artificial sharkskin that does not allow resistant bacteria to grow on it. disease-causing microbes have been genetically modified to keep them from infecting the skins of sharks. scientists have created a device that can be attached to the skins of sharks that dramatically increases their abilities to resist disease. sharkskin produces many chemicals that can be collected and used to create antibiotics.