1. A trilobite is considered an index fossil because this organism existed during a limited period in Earth's history. That means that any fossil located in a layer of rock beneath a layer containing trilobite fossils is ____________ than a trilobite.
2. According to this diagram, monotremes, marsupials, and placentals have the same _________ known as therapsid.
For this one, there is a cladogram with the therapsid at the bottom and the monotremes and marsupials on the top.
Is 1. "older" and 2. "ancestor"?
Bro! I go to connexus as well but calm down! just give her the answers and go on. You are correct 1 is older and 2 is ancestor.
we don't care!!!!!!!
Like we give a damn about the honor code :/ If you're not helping then get out of this website.
ythanks guys for caring but its not needed we got his love ypu all
the first is correct. On the second, I have no idea what the diagram is, however, I suspect your "ancestor" is correct.
This is the diagram:
connexus. com/content/media/917517-482013-73416-PM-569566141.jpg