The discovery of the organism Thermus aquaticus was critical for the development of the technique of PCR
Indicate whether the statement is true or false
TRUE
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According to most conservation biologists, the single greatest threat to global biodiversity is _____
A) chemical pollution of water and air B) stratospheric ozone depletion C) overexploitation of certain species D) alteration or destruction of the physical habitat
The genotype is fixed at the moment of ____________________ and, barring mutation, is unchanging
Fill in the blank(s) with correct word
What is found in the channels within the Haversian system?
a. cartilage b. extracellular fluid c. intracellular fluid d. blood vessels and nerves e. calcium stores
The following table presents the effect of different media on the growth response of tryptophan mutations in Salmonella typhimurium (+ = growth, - = no growth)
Medium Supplemented with Strain No Supplement IGP AA IN TRY trp-8 - + + + + trp-2 - + - + + trp-3 - - - + + trp-1 - - - - + (a) Construct the biochemical pathway for the compounds IGP, AA, IN, and TRY based on these data. (b) Place strains of bacteria (mutations) in the appropriate steps in the pathway. (c) In bacteria, it is often possible to make partial diploid strains. Assume that a diploid strain was made containing the complete genomes of the trp-2 and trp-1 strains. Would this diploid strain be able to grow on the unsupplemented medium? Explain your answer.