Mr. and mrs. smith, an elderly couple, had no relatives. when mrs. smith became ill, the smiths asked a friend, henrietta, to with various housekeeping chores, including cleaning and cooking. although the smiths never promised to pay her, henrietta performed the chores for eighteen months. henrietta now claims that she is entitled to the reasonable value of the services performed. is she correct? explain.

Scientists developed the first successful human cell culture in vitro (grown in a lab) in the 1950s by removing cancer cells from a woman. this concept has allowed modern scientists to successfully grow organs. which of the following answers  bestdetermines why there was success?   neurons send a signal to the cell to multiply.a large blood supply to the cell allows enough nutrients for growth.cells are the basic unit of life and thus can regenerate if in a controlled environment.cells cannot reproduce on their own, and the scientist manipulates them to grow.