The switch from a lysogenic prophage to a lytic cycle is called
A. transformation.
B. induction.
C. latency.
D. phage conversion.
E. injection.
B. induction.
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Scientists estimate that carbon dioxide in the atmosphere has increased by 35% in the last 150 years
Indicate whether the statement is true or false.
Genetic studies of an animal show that eye color is controlled by an autosomal gene with the dominant
allele (R) for red eye color and the recessive allele (r) for yellow eye color. A second autosomal gene has the dominant allele (T) leading to paws with thumbs while the recessive allele (t) codes for paws without thumbs. The genetic cross RRTT ? rrtt creates offspring with genotype RrTt. One of those dihybrids is mated in a testcross (RrTt ? rrtt). If the two genes are completely linked (no recombination occurs between them), then the testcross should produce offspring with the phenotype ratio
a. 3 red-eyed with thumbs: 1 yellow-eyed without thumbs. b. 1 red-eyed with thumbs: 1 yellow-eyed with thumbs: 1 red-eyed without thumbs: 1 yellow-eyed without thumbs. c. 1 red-eyed with thumbs: 1 yellow-eyed without thumbs. d. 9 red-eyed with thumbs: 3 yellow-eyed with thumbs: 3 red-eyed without thumbs: 1 yellow-eyed without thumbs. e. 1 yellow-eyed with thumbs: 1 red-eyed without thumbs.
The connective tissue of the skeletal system include(s)
A. ligaments. B. bone. C. cartilage. D. tendons. E. All of the answer choices are correct.
The half-life of Carbon-14 is approximately 5,700 years. Using this information scientists have been able to determine the age of some artifacts left by humans. A scientist wants to know approximately how old a piece of wood was that she found on the floor in an old cave that had recently been discovered. She removed the wood (with permission) to her laboratory. Her wood sample contained 2 grams of Carbon-14. If the age of the wood was determined to be 22,800 years old, how much Carbon-14 originally existed in this piece of wood?
A. 8 grams B. 16 grams C. 4 grams D. 32 grams E. 12 grams