The features seen in the fossil bird Archaeopteryx
A. show that Archaeopteryx had feathers, but not wings.
B. support the hypothesis that birds evolved from dinosaur ancestors.
C. show that Archaeopteryx is not a remnant of a living organism, but an unusual rock formation.
D. suggest that birds and dinosaurs were designed to fit into different kinds of habitats and then placed there.
Answer: B
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At a convergent plate boundary a dipping plane of earthquake foci, called a(n) ____________________, defines subduction zones
Fill in the blank(s) with correct word
Mafic magma generated in the ________ rises to the base of the crust.
A. spreading ridges B. asthenosphere C. outer core D. mantle plumes E. continental crust
All of the following are soil-forming factors except
A. organisms. B. leaching. C. time. D. parent material.
Rocks and sediments composed of clay-sized clasts generally have ____
a. high permeability and high porosity b. low permeability and low porosity c. high permeability and low porosity d. low permeability and high porosity