Are chromosomal mutations beneficial , harmful , or neutral?

In the ocean why are the greatest amount of primary producers found in the epipelagic zone and how does that affect biodiversity

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

Which description shows competition in an environment? an organism that feeds on some food an organism that finds a place to sleep three organisms of the same species living in an area three organisms battling over limited resources