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what is true of the revolution period of the moon?

always changing

less then the rotation period

greater then the rotation period

equal to the rotation period

In the african savanna,more wildebeests are born than the environment can support. which is most likely to happen over a period of years as a result

What do your cells need to live? a. carbon dioxide b. carbon c. air d. oxygen

Embryonic stem cells are cells derived from an embryo. these cells can be used to create new tissues for patients suffering from certain illnesses and disorders. which statement best summarizes why the use of embryonic stem cells could be seen as unethical? a. some people consider embryos to possess rights equal to those of fully developed human beings. b. extracting stem cells from embryos is a very energy-intensive process, which consumes resources that could be used elsewhere. c. embryos are difficult to obtain, so the monetary cost of using them for research outweighs their benefit. d. the process of extracting stem cells from embryos generates biohazardous waste that cannot be safely disposed of.