Which description shows competition in an environment?

three organisms battling over limited resources

an organism that finds a place to sleep

an organism that feeds on some food

three organisms of the same species living in an area

What evidence is there that convection occurs in earth’s troposphere?

According to theories of how life began, how did early organic molecules begin to separate from the outside world? a: specialized enzymes were required b: chains of amino acids created a barrier c: formation of microspheres or vesicles d: rna catalyzed the formation of membranes

What term describes a doctor who becomes a specialist by meeting standards beyond those of getting a license and passing a test in the specialty area?