Jimmy and joanna were walking in their backyard and noticed a mushroom growing on the outside of a dead tree. jimmy claimed that the mushroom was a plant, but joanna said that it was not a plant, but a fungus. in this case, what evidence best supports joanna's claim? a) the mushroom was a producer. b) the mushroom was a autotroph. c) the mushroom was a decomposer. d) the mushroom was a heterotroph. .

Match the following terms describing electrical events with the correct phases of the cardiac cycle. the ventricular muscle cells depolarize at the start of this phase. during this phase, na+ entry through the funny channels causes the pacemaker potential of sa nodal cells to gradually become less negative until it reaches threshold. the ventricular muscle cells repolarize right before this phase. the cytosolic concentration of calcium in the contractile cells of the ventricle is highest during this phase. a. isovolumetric relaxation b. ventricular ejection c. isovolumetric contraction d. ventricular filling

Identify the examples in which sam interacts only with natural resources

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