Changes in gene expression can be adaptive.
a. true
b. false
a. true
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Which procedure is most associated with unsuccessful transformation and degradation of DNA?
A. Induced transformation with plasmid DNA in noncompetent bacteria. B. Naturally-occurring transformation with DNA fragments in competent bacteria. C. Integration of DNA fragments in competent bacteria following naturally-occurring transformation. D. Addition of DNA fragments from competent bacteria to live, noncompetent bacteria without artificial induction.
What is the difference between a nucleotide and a nucleoside?
A) Nucleotides are found in DNA, while nucleosides are found in RNA. B) Nucleotides are involved in eukaryotic DNA replication, while nucleosides are used in bacterial DNA replication. C) Nucleosides contain only deoxyribose sugars. D) A nucleoside with a phosphate ester linked to the sugar is a nucleotide. E) Nucleosides are purines, while nucleotides are pyrimidines.
What level of ecology is concerned with both the biotic and abiotic aspects of an environment?
A) community B) organism C) ecosystem D) population
Following telophase in animal cells, a cell plate begins to form
Indicate whether the statement is true or false