An ecologist studied the effect of biotic and abiotic factors on a population of bacteria at the bottom of a pond. his study would include all but which levels in the structural hierarchy of life?

Ihave made a synthetic cell by placing a solution that is 10% sodium chloride inside a semipermeable membrane through which water can pass but not sodium chloride. if i place this cell into a solution that is 20% sodium chloride what will happen to the size of the cell? will it increase, decrease, or stay the same in size?

Jaden’s father is immune to poison ivy. jaden is also immune to poison ivy. jaden’s immunity to poison ivy is which kind of trait?

Is a glacier nothing more than a huge mineral flowing downhill? be sure to defend your answer with facts.