Amodel of the complex feeding interactions among organisms in a community from producers to decomposers is called a

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

Are the earth's ocean floor and continents the same age geologically? why or why not?

Which of the following is the earliest era of earth's geologic time scale? cenozoic mesozoic precambrian paleozoic