Gingko trees are known to lose their leaves at a certain time each year throughout the United States. Based on this information, Gingko trees in China must behave the same way. These statements are an example of
A. a theory.
B. deductive reasoning.
C. an experiment.
D. inductive reasoning.
Answer: B
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The molecule shown above is ribose, an example of a ____ sugar
a. triose b. hexose c. pentose d. heptose e. tetrose
The first barrier to invasion is
a. antibody production. b. intact skin and body cavity linings. c. direct attack by white blood cells. d. innate immunity. e. development of memory cells.
Arrange the following structures, which can be found on male pine trees, from the largest structure to the smallest structure (or from most inclusive to least inclusive)
1. sporophyte 2. microspores 3. microsporangia 4. pollen cone 5. pollen nuclei A) 1, 4, 3, 2, 5 B) 1, 2, 3, 5, 4 C) 4, 1, 2, 3, 5 D) 4, 3, 2, 5, 1
All living organisms have evolved from a single common ancestor. The existence of which molecule lends the greatest support to this statement?
a. phospholipids b. ribosomal RNA c. transfer RNA d. DNA e. messenger RNA