Which if the following is an example of natural selection? What about artificial selection?

How can scientists test their ideas about the origin of the universe if they can't physically interact with or study?

The bacteria found in soil is usually harmful and measures are taken to remove any traces of microorganisms. true or false

Which organelles are labeled d, and what is one feature that distinguishes them from the other labeled organelles chloroplasts the only organelles that produce sugars from sunlight mosomes, only found in animal and bacterial cells centricles only found in animal cells mitochondra, the only energo-generating structures found in cells