Explain how plants and animals help each other obtain energy. (Site 1)

Compare and contrast the adaptations of free-living flatworms and parasitic flatworms

Drag each label to the correct location on the image. each label can be used more than once. a scientist introduced mutations in a gene sequence isolated from bacteria. study the sequence, and identify the steps where the mutations may affect the formation of proteins. in the sequence, black letters stand for protein coding regions and red letters stand for noncoding regions. protein will not be changed. protein may be changed. attcgtgttc atcgtgttc atcgtattc attcgtattc

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