Which of the following would a scientist use during the entire process of conducting an experiment?
a. descriptive reasoning and inductive reasoning
b. descriptive reasoning and deductive reasoning
c. deductive reasoning and inductive reasoning
d. only deductive reasoning
c. deductive reasoning and inductive reasoning
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What are the two most important nutrients affecting production in aquatic ecosystems?
A. oxygen and hydrogen B. carbon and oxygen C. carbon and iron D. nitrogen and phosphorus E. carbon and calcium
What characteristic do all eukaryotic cells have in common?
What will be an ideal response?
Scientists have a complete fossil record showing the evolution of horses over millions of years, with the legs becoming longer and the teeth larger, as ancestors of the modern horse adapted from living in forest to grasslands. This is an example of
A. punctuated equilibrium. B. extinction. C. a postzygotic barrier to evolution. D. gradualism. E. a prezygotic barrier to evolution.
A woman heterozygous for blood type A and a man with blood type AB are expecting a child. The probability of the child having type B blood is
A. 0. B. 1/4. C. 1/2. D. 3/4.