Opossums are omnivores and survive by eating a variety of foods. The primary sources of sustenance are small rodents, insects, worms, slugs and snails, frogs and birds. Additionally, opossums eat vegetables, berries, nuts, fruit, garbage, pet food and bird seed. Opossums are resistant to rabies and rarely carry the disease. Opossum feces, however, sometimes carry the eggs of a parasite that may cause illness in horses if the feces contaminate food and water. According to the Connecticut Department of Energy and Environmental Protection, most opossums don't shed the parasite, and even if exposed, most horses don't contact the disease.
The T-Flip flop will change its output from on to off, or vice versa, each time it receives an input. The D-Flip flop will change its output to whatever the signal at the other input is, each time it recieves an input.
Using appropriate input signals, you can trigger the flip-flop from one state to the other. The diagram below shows the input and output connections of a single D-type bistable: and are the outputs of the bistable. The logic states of the outputs are always opposite.