All but one of the factors may cause an animal species to be placed on the endangered list. the factor that does not directly contribute to the endangered status is
a) pollution from human sources.
b) habitat loss because of city construction.
c) introduction of non-native animals to the range of the animal.
d) introduction of the animal into places that it has previously gone extinct.
Answers: 2
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Which statement best describes the relationship between an allele and a gene? question 1 options: an allele is a variation of a gene that can be expressed as a phenotype. an allele is the part of a gene that attaches to messenger rna molecules. an allele is a segment of a dna molecule that controls replication of a gene.
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Which of these correctly describes the difference between processes that take place in prokaryotic and eukaryotic cells?
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Which of these is one of the nitrogenous bases in dna? a. proline b. leucine c. glycine d. thymine
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