The pyramid above illustrates the trophic levels in a typical forest or swamp ecosystem. In the soil, the organisms play a specialized role in the ecosystem. Select all of the statements that accurately describe the role of the soil organisms.
es )
A)
Decomposers help maintain soil quantity and quality in the ecosystem.
B)
Decomposers harness the light energy that is not captured by the
producers.
Fungi, worms, and insects break down dead organic matter to recycle the
nutrients.
Decomposers are both heterotrophic and autotrophic, playing dual roles in
the ecosystem
D)
E)
Soil organisms feed on the organic matter lost as waste from all levels of
the food chain

Astudent from one of the research labs is having trouble preparing a slide for examination and photographing. the bacterial slide that he has brought to you was prepared using a commercially purchased stain. he has asked for your in determining what he is doing wrong so that he can change the lab protocols and continue on with his project. after examining the slide under oil immersion, you determine that no bacteria are present even though the student is able to show you the culture he used to make that slide that has visible growth in the liquid medium. which of the following statements does not explain the fact that there are no bacteria present on the student’s slide? by not allowing a glass slide to completely air dry before heat fixation, the flame will cause the surrounding water to boil and this will damage the bacterial cell. overheating during the fixation step boiled the water within the bacterial cells and resulted in the cells bursting. insufficient heating of the slide did not drive out the thin layer of water and this resulted in minimal bonding between the bacteria and the glass slide. rinsing with alcohol during the washing step stripped the bacteria off the glass slide. rinsing with alcohol during the washing step stripped the bacteria off the glass slide.