Is the term for the amount of time it takes a nucleus to decay to half of its original amount. half life isotope radioactive

Types of scientific inquiry that biologist engage in that cannot be completely controlled

In this assignment, you will analyze an example of speciation by researching the finches of the galapagos islands. then you will answer questions to construct explanations and draw conclusions based on the information you gather. someone plz !

10. in which phase will crossing-over occur? a. mitosis b. metaphase ii c. prophase i d. meiosis ii