Explain how epigenetics works.
What will be an ideal response?
Epigenetics works by blocking a cell's ability to read certain genes. A gene can be blocked in the off position by methylation.
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Which of the following is (are) used by microorganisms to become resistant to a particular drug?
A. Exclusion of the drug from the cell B. Enzymatic inactivation of the drug C. An alternate metabolic pathway that bypasses the drug-sensitive step D. All of the choices are correct.
Mercury can serve as a transcriptional activator in the regulation of certain genes
Indicate whether the statement is true or false.
A grasshopper belongs in the Ecdysozoa clade because of its ability to:
a. molt. b. develop. c. live on land. d. reproduce sexually. e. maintain homeostasis.
A(n) ________ organism require(s) oxygen for growth
A) anaerobic B) facultative anaerobic C) aerotolerant D) obligate aerobic E) aerotolerant and an anaerobic