Desertification is taking place in the Sahara but not in the developed world. Indicate whether the statement is true or false
F
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What trait is found in many organisms that live in hot environments?
A. They have more A-T pairs in their DNA. B. They have more G-C pairs in their DNA. C. Their DNA is supercoiled. D. They have a double nucleus.
How has discovery of these minute phytoplankton changed our understanding of marine food webs?
1.No change, as they’re too small to be eaten by anything.
2.The base of the food web has organisms much smaller than diatoms.
3.Their growth is usually limited by nutrients, hence they’re unimportant.
4.They are actually eaten by all marine life.
A geoscientist performs analyses on a rock to gather data recording its specific chemical composition. This type of data is
A. qualitative. B. quantitative. C. a survey.
What was a feature of the French rail system?
A) It was owned by the government. B) Lines only went from north to south. C) Water-based shipping companies refused to load their goods onto railcars. D) It operated within cities, but did not connect major cities to one another. E) It was centered on Paris.