The first animals arose on Earth approximately ______ years ago.Multiple choice question.570 million900 million140 million750 million

The first animals likely arose from aquatic protists called ______ about 570 million years ago.Multiple choice question.diatomsamoebaschoanoflagellatesdinoflagellates

Homo sapiens first appeared approximatelyChoose 1 answer:Choose 1 answer:(Choice A)   50,000 years agoA50,000 years ago(Choice B)   200,000 years agoB200,000 years ago(Choice C)   800,000 years agoC800,000 years ago

The first ancestors of humans showed up about ______ years ago.A.10,000B.65 millionC.1 millionD.4.5 billio

The species Homo sapiens had migrated out of Africa and colonized Europe, Asia, and Australia by about ______ years ago.Multiple choice question.40,00014,00010,000250,000

Our current estimates state that the Earth is about Blank______.Multiple choice question.100 billion years old4.5 billion years old4.5 million years old100 million years old