Complete the paragraph to describe how scientists obtain information about past elmes, RE
Glaciologists, geochemists, and climatologists study ice layers to learn about past climates. Distinct ice layers are
caused by
v. When studying ice layers, scientists use
to measure isotopes of
certain gases. These gases reveal the
at the time when the ice layers were formed.
Done
Intro

The pressurized plants and fungi mentioned in the video have some surprising similarities. what differences would you expect them to have?

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.

Which of the following is required of a new drug?me