Plants can grow successfully in soil that is considered sub-par if they have a. water. b. mushrooms. c. lichens. d.

Which of the following is a macronutrient? carbohydrates lipids amino acids all of the above

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 of the following cell structures is significantly different between gram- positive and gram-negative bacteria?