Which of the following statements explains why the presence of Mesosaurus in both South America and Africa supports the continental drift hypothesis?
a. Mesosaurus was a freshwater aquatic reptile and swam from South America to Africa.
b. Mesosaurus was a terrestrial reptile that rafted across the ocean from South America to Africa.
c. Mesosaurus was a saltwater aquatic reptile and swam from South America to Africa.
d. Mesosaurus was a freshwater aquatic reptile with fossil remains in both South America and Africa.
e. Mesosaurus was a terrestrial reptile that was able to cross from Africa to South America by an isthmian link.
d. Mesosaurus was a freshwater aquatic reptile with fossil remains in both South America and Africa.
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What class of mineral forms when the elements Cl or F is bonded with a metal, as in the mineral halite?
A. oxides B. carbonates C. silicates D. halides E. sulfides
Nearly 300 million years ago, dragonflies existed that were the size of large hawks today. Some scientists believe that these giants could fly then, but not today, because oxygen levels in the atmosphere were much greater
If oxygen levels 300 million years ago were 50% higher than today, what percentage of the atmosphere would have consisted of oxygen for these giant dragonflies? A) 30% B) 20% C) 10% D) 2%
Which of the following is used to define lipids?
A) the presence of a specific functional group B) their chemical structure C) their insolubility in water D) none of these
What was the hallmark of Fordism?
A) downsizing B) the establishment of the automobile industry C) standardized work and interchangeable parts D) shift to service sector employment E) higher levels of education in the U.S.