How are elements that are heavier than hydrogen spread throughout the universe? a. when a star collapses into a neutron star b. when a star forms into a red giant c. when a star collapses as a black hole d. when a star explodes as a supernova

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

What best explains the inability for life to exist in earth early atmosphere

Aristotle classified animals according to their a. habitat and mating behavior c. mating behavior and relatedness b. habitat and physical differences d. physical differences and mating behavior