The role that humans play in artificial selection is to train organisms to breed more successfully. choose which organisms breed, and which do not. create the genetic variants, which nature then selects. perform artificial insemination. determine who lives and who dies.

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what statement best describes the difference between the sympathetic and parasympathetic nervous systems?

the sympathetic nervous system prepares the body for intense physical activity and is often referred to as the fight-or-flight response. the parasympathetic nervous system has almost the exact opposite effect and relaxes the body and inhibits or slows many high energy functions.

i was thinking 4.0 v hope this

meiosis is the first to occur after the nuclei of opposite of opposite mating types fuse