You have been hired as a consulting microbiologist to help a wildlife ecologist understand the microbial diversity in soil samples from different habitats. If you had DNA samples from 3 habitats, explain the steps (from sample to data analysis), the gene-based approach you would use to do this work and the steps you would use to determine if the microbial communities in the samples were taxonomically similar or different

List the advantages and disadavantages of the switch from persistent chlorinated hydrocarbon pesticides (such as ddt) to nonpersistent organophosphate pesicides. have the benefits of the switch outweighed the disadvantages? explain.

Juan and carol were studying invertebrates in biology. they knew that segmented or earth worms preferred a dark, moist habitat. during this lab, they would be investigating the responses of organisms called planaria or dugesia tigrina. these were simple flatworms that still had a one-way digestive system and a very simple nervous system. juan and carol placed the planaria in a petri dish containing cool, distilled water that was partially covered with black paper. they shined a light on the dish. next, they removed the paper and placed a small amount of chicken liver at one end of the dish. they added a few large salt crystals to the water. finally, they added drops of hot water to the cool water in the petri dish. their results can be seen in the data table. according to their experiment, all but one conclusion is valid.

Drag the tiles to the correct boxes to complete the pairs. match each cell organelle with its description.