Vegetative associations are called plant ____________________
Fill in the blank(s) with correct word
communities
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How does fractional distillation work?
A. It takes advantage of the different melting points to separate molecules. B. It takes advantage of the different boiling points of molecules to separate them. C. It uses the fraction of carbon in the isomers to separate the molecules. D. It takes advantage of the different weight of molecules to separate them. E. none of the above
What kind of information can be determined about the ocean with the use of satellites?
A) The height of the sea surface B) The temperature of the sea surface C) The amount of plankton productivity D) All of these choices
Oxygen-isotope analysis:
A) cannot be carried out on ice cores or sea floor sediments, but works well for tree ring analysis. B) has been shown to be of little or no use in the study of past climatic changes. C) relies on the fact that 16O evaporates from the ocean more readily than 18O. D) is very simple.
List the four countries that belong to the Slavic area: