Soil particles are classified on the basis of
A) age.
B) color.
C) water content.
D) size.
D
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Each amino acid has a different side chain, called a(n) ____
a. amino strand b. carboxyl group c. R group d. glucose pentose configuration e. ribosomal attachment
The concept of a species was proposed by
A. Charles Darwin. B. John Ray. C. Carolus Linneaus. D. Erasmus Darwin. E. George Cuvier.
Which of the following is a stage of mitosis?
A) cytokinesis B) telophase C) interphase D) DNA synthesis
Which of the following series of events correctly describes the evolutionary history of the vertebrates, from earliest to latest in time?
a. four limbs ? hair ? lungs ? jaws b. jaws ? lungs ? four limbs ? hair c. hair ? four limbs ? lungs ? jaws d. lungs ? jaws ? four limbs ? hair e. four limbs ? lungs ? jaws ? hair