Experimentation is only one part of the process of scientific inquiry, but it is a very important step because it _________.
Fill in the blank(s) with the appropriate word(s).
Answer: allows rejection of hypotheses
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The equation CaSiO3 + CO2 CaCO3 + SiO2 takes into account which of the following processes associated with the long-term carbon cycle?
A. volcanism B. chemical weathering C. subduction D. plate tectonics E. bacteria-based oxidation
Which is/are true of coenzymes?
A. They are organic molecules. B. They transfer atoms from one molecule to another. C. They may bind to a number of different enzymes. D. They are synthesized from vitamins. E. All of the choices are correct.
Four of these statements are true about mitochondria. Which one is not true?
a. They have DNA. b. Their DNA can experience mutations. c. In animals, the mitochondria come from the mother. d. They undergo genetic recombination during fertilization. e. Their DNA can be used as molecular clock.
Logically, which of these should cast the most doubt on the relationships depicted by an evolutionary tree?
A. Some of the organisms depicted by the tree had lived in different habitats. B. None of the organisms depicted by the tree ate the same foods. C. Relationships between DNA sequences among the species did not match relationships between skeletal patterns. D. The skeletal remains of the organisms depicted by the tree were incomplete (in other words, some bones were missing). E. Transitional fossils had not been found.