What is a symbiotic relationship?

Suggest why placing wheels under a heavy box reduces the neccessary force required to push it along at a constant speed.

Mineral rich water heated by newly found oceanic crust escapes through cracks in the ocean floor called

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