Lichens are often the first species to colonize an environment during primary succession. In general, the first species to colonize an environment is called i need he

the answer to this predicament is false, by friend, i had this on a quiz, and i got it wrong, so i learned it, cos i was gonna have it on a test, and i got it right

he forelimbs below belong to four species that descended in a direct line from the ancestral mammal shown above. of the four descendants shown, which species most likely appeared earliest in evolutionary history?

layer 3 is younger than layer 6.