Uranium 245 has a half-life of 700 million years. Scientists are studying rocks from the Precambrian and in those rocks, the uranium is discovered to have been through 6 half-lives. How old are the rocks?

Which group of algae is characterized by unicellular organisms and includes some members that would be better classified as zooflagellates? euglenophytes red algae sporozoans green algae

Which best describes the nucleus of an atom a. it is where all of the particle s of the atom are located b. it is the negatively charged part of the atom c. it is where the electrons and the protons are located d. it is the part of the atom with the greatest mass

Por qué crees que los huevos con cáscara se llaman amnióticos?