Oil and natural gas are made of what? a. material from decayed land plants b. volcanic ash deposits c. the remains of dead marine organisms d. compacted sand

Explain why scientists use shared characteristics to make cladograms.

Avariable that is not being directly tested during an experiment should be

I'm learning about the periodic tables and what each subject's configuration is. for example, hydrogen is 1s^1, but i don't understand how you get that. can someone me understand how to figure out how to figure this out? sorry if the question makes no sense, but it would really a lot if you could me understand! you so much if you can!