Listen Base your answer on the cross-section below and your knowledge of Earth Science. The cross-section represents three
outcrops found several kilometers apart. The time period when cach sedimentary rock layer formed is shown. The symbols (star, circle, cross, square, and triangle)
represent fossils of different types of organisms present in the rock layers.
Outcrop 1
Outcrop 3
Permian
Outcrop 2
Pennsylvanian
Devonian
Pennsylvanian
Permian
X
X
Silurian
х
Mississippian
х
Devonian
o
X
Dovonian
O A
Ordovician
Camprian
Silurian
Give one characteristic that makes for a good index fossil.

How did the research presented in the article affect scientists' understanding of the evolution of eukaryotes

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.

The basic kind of life cycle found in the simplest animals is: haplontic or diplontic