Which of the following is a trace fossil?

a. mammal tooth d. dinosaur footprint
b. frozen mammoth e. clam shell
c. ripple mark


D

Environmental & Atmospheric Sciences

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What are the types of symbiotic relationships that organisms exhibit? Give examples of each

Environmental & Atmospheric Sciences

The idea that the genetic code seems to be "arbitrary" (i.e. could be different and still function as well) actually strengthens the hypothesis that all life shares a common ancestor.

a. true b. false

Environmental & Atmospheric Sciences

The electric force between a pair of charges is strongest when the charges are

A. close together. B. far apart. C. either of these D. none of the above

Environmental & Atmospheric Sciences

All living things of the Earth system constitute the ____

a. atmosphere b. lithosphere c. hydrosphere d. biosphere e. asthenosphere

Environmental & Atmospheric Sciences