3 m/s north is an example of a(n) ​

In which situations is the principle of cross-cutting relationship useful in determining relative age?

In a cladogram' when does a group of organisms branch off

Question 17 (1 point) where does penicillin come from? a. it is a chemical that man invented b. it is a fungus c. it is a toxin made by other bacteria d. it was discovered in archaebacteria