Once rat poison is past its expiration date, does it become more or less potent?

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Blood stem cells may develop into any kind of human blood cells. what kind of stem cells are blood stem cells? a. multipotent stem cells o b. totipotent stem cells o c. pluripotent stem cells o d. unipotent stem cells

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