What role would an owl that eats a seed-eating mouse perform in a food chain?
A) producer
B) primary consumer
C) secondary consumer
D) tertiary consumer
C
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The most common type of polyploidy in humans is ____
a. trisomy b. monosomy c. triploidy d. tetraploidy e. haploidy
Scientists want to determine whether chemical X, a component of fertilizer, is harmful to fish. They treat fish in the
laboratory with increasing amounts of the chemical for one week and then measure their viability. When researchers designed this experiment, they wrote "chemical X is toxic to fish" in their lab notebook. This statement is a(n) ____.
a. interpretation b. prediction c. hypothesis d. result e. theory
If the DNA nucleotides read
ATG?CGT?GAC, the amino acid sequence of the resulting polypeptide would be a. tyrosine ? alanine ? leucine. b. methionine ? arginine ? asparagines. c. histidine ? glycine ? praline. d. serine ? lysine ? glycine. e. all of these.
Analysis of a certain polymer shows that it contains phosphate groups, ribose groups, and pyrimidines
Based on this information, which of the following is the best description of this compound? a. It is most likely ribonucleic acid. b. It is DNA. c. It is an inorganic compound. d. It contains thymine. e. It is a polypeptide