Which of the following would be least likely to form a fossil?
a. an animal with an exoskeleton
b. an animal with an endoskeleton
c. a marine organism
d. an organism in the tropical rain forest
e. an organism living in a lake
D
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The region of the centromere contains repeated DNA sequences known as ________.
Fill in the blank(s) with the appropriate word(s).
The behavioral, physiological, and energetic activities involved in current reproduction result in
A) reduced future survival, fecundity, and growth. B) reduced future survival and fecundity but increased future growth. C) reduced future survival but increased future fecundity and growth. D) increased future survival, fecundity, and growth.
Which of these valves is found between the right atrium and the right ventricle?
A. tricuspid valve B. bicuspid (mitral) valve C. aortic semilunar valve D. pulmonary semilunar valve E. interventricular septum
The majority of phyla from domain Bacteria were discovered by
a. sequencing isolates cultivated in laboratory media. b. sequencing DNA extracted directly from environmental samples. c. using enrichment media. d. transmission electron microscopy.