Some isotopes, however, decay slowly, and several of these are used as geologic clocks. Dating rocks by these radioactive timekeepers is simple in theory, but the laboratory procedures are complex. <span>All methods rely on the fact that certain elements (particularly uranium and potassium) contain a number of different isotopes whose half-life is exactly known and therefore the relative concentrations of these isotopes within a rock or mineral can measure the age.</span>
Answer:
No, not according to any sciences (unless you mean aliens as in immigrants)
Explanation:
When completing Punnett Squares, you cross the letters that meet up. For example, their are two TTs and two Tts. Dominant will always show before a recessive so if it's TT or Tt it will be the dominant version. two tt's mean that it's recessive. In a Punnett Square, one box = 25%.
Part A: The genotypic ratio is 50% TT and 50% Tt. The phenotypic ratio is 100% tall.
Part B: The two Tt's could produce a short plant because there is a 25% that the parents will both give t's.
I’m pretty sure it would be electrical, but since is not an answer the the best would probably be chemical, since heat isn’t able to charge a phone, you’re not using nuclear decay to charge a phone, and the charging cord is not radiating power to your phone
