Which of the following is not a characteristic of all living things?
A) They contain carbohydrates, proteins, lipids, and nucleic acids.
B) They are composed of multiple cells.
C) They have adaptive traits.
D) They respond to stimuli.
Answer: B
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Edge effects are the result of which of the following?
A. Populations of flora and fauna have emigrated from the core of their population center to the edge of their habitat. B. Metapopulations of some of the larger fauna have become more dominant on the landscape and as a result have increased the edge of their habitat. C. Habitat fragmentation or habitat shrinkage has occurred, and thus the edge of the habitat has increased in relative proportion. D. Habitat fragmentation or habitat shrinkage has occurred, and thus the edge of the habitat has decreased in relative proportion. E. Populations of particular species have decreased and are on the edge of extinction.
How can fossils provide evidence for macroevolutionary processes, such as the divergence of two species from a common ancestor?
A. by providing a complete record of the history of life B. by exhibiting some features of ancestral organisms and some features of more derived organisms C. by preserving the bones, rather than the soft parts of ancient organisms D. by preserving a large number of organisms present in one place and one time, as is seen in Messel Shale
When a sarcomere is at rest, the myosin binding sites on actin are blocked by _____
a. phosphorous b. sodium
c. tropomyosin d. the myosin heads e. AMP
The _____ is an opaque disk with an adjustable aperture that by adjusting may improve the contrast of the image.
A. Condenser B. Objective C. Iris diaphragm D. Ocular