How much more powerful than the asteroid
impact that created the Barringer Crater in
Arizona was the asteroid impact that created
the crater off the coast of the Yucatan
Peninsula?
a. 10 million times
b. 20 million times
c. 30 million times
d. 40 million times
e. 50 million times
D
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The process of natural selection results in Select all that apply.
_____ Extinction. _____ Random genetic mutations. _____ Adaptation. _____ Speciation.
What are the three tissues of a vertebrate gastrula?
What will be an ideal response?
Chloroplasts are put in the dark, what must they be provided with in order to continue making sugar?
a. CO2 and ATP b. NADPH and ATP c. NADPH, ATP, and CO2 d. NADPH, CO2, and ADP
For a span of some 300 million years, the Paleozoic era, in which vascular plants, fishes, and other diverse life appeared, lasted approximately ___ of the geologic timescale.
A. 7% B. 15% C. None of the answer choices is correct. D. 50% E. 85%