The earliest fish were
a. ray-finned. d. jawless.
b. bony-finned. e. lungfish.
c. cartilaginous
D
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What are some of the advantages and disadvantages of commercial pesticides and more sustainable pesticides? Which do you think is the best choice for the future?
What will be an ideal response?
Imagine that a blob of mafic magma and blob of felsic magma meet within the crust. What is the likely outcome?
A. Most of the mafic magma would solidify into bits of basalt and gabbro with the felsic magma. B. The result will be a new blob of magma and resulting igneous rock with a composition exactly intermediate between the two originals. C. The two original blobs will not mix and will maintain their own distinct characteristics.
What factors determine whether precipitation will become running water or infiltrate?
What will be an ideal response?
Soil creep
A. is more of a hazard to property than to lives. B. commonly triggers snow avalanches because it makes overlying snow unstable. C. cannot be recognized or detected because it is such a slow process. D. All of the choices are correct.