What are the sources of variation in a population? multiple choices unless it's all, idk

Which best describes how parents affect the genotype of a child? a.the parents decide what to feed their child b.the parents choose whether to educate their child c.the parents allow their child to stay up late d. the parents pass along genes to the child

Coral reefs support more species per unit area than any other marine environment on earth. what is one way coral reefs are important to the health of the biosphere

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