They can watch informal videos,take notes and participate in the class/ask questions.
Answer Viruses
I believe the answer is viruses because viruses destroy and attack cells. Also they invade bodies. Hope this was helpful :)
Answer:
Work with agricultural scientists in plant, fiber, and animal research, or assist with animal breeding and nutrition. Set up or maintain laboratory equipment and collect samples from crops or animals. Prepare specimens or record data to assist scientists in biology or related life science experiments.