What effects result when there is an impact between Earth and an asteroid? Check all that app
massive flooding
extinction of many life forms
major earthquakes
change in average global temperature
Giant dust cloud

Which of the following is one of the four conditions necessary for natural selection to occur in a population? fewer organisms are born than the habitat can support mutation does not occur organisms have identical characteristics variation is inherited

Which of the following is a limitation of a clinical trial? a.)amount of random assignments b.)hospital cost c.)number of test tubes d.)amount of peer review

Explain how mendel kept his pea plant from self pollination