Adult mountain lions (Puma concolor) are almost 2 meters long and have a black spot over each eye. The commonheter names used in different parts of the US are listed below. Why is it best for scientists to use the scientific name Puma concolor from the standardized taxonomic system instead of the many common names
1. Mountain lions
2. Cougar
3. Puma
4. Panther
5. Yuma Puma
6. Florida Panther
7. Eastern Cougar
8. Wisconsin puma
9. Texas panther

A. The standardized name differentiates mountain lions and pumas.
B. The standardized name is less descriptive of the animal that has been observed.
C. Communication with other scientists about mountain lions will be reduced.
D. All scientists will be using one name for mountain lions.

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.