<span>Molten material found in the bottom of seafloors indicated underwater eruptions that formed new areas of the seafloor was presented as evidence for seafloor spreading. Due to earths magnetic polarity and its tendency to switch, iron present on the sea floor contained a magnetic record of sea floor expansion progress. Finally, drilling samples obtained in the seafloor indicated the deeper samples of were significantly older than the shallower samples that were brought up.</span>
Answer:
eukaryotic because they have a nucleus in their cell.
Explanation:
Answer:
having traits that help a single organism survive
Answer:
because different cell types can perform different functions
Explanation:
mollusks and arthopods............
