DNA methylation suppresses gene expression in eukaryotes
____________________ Indicate whether the statement is true or false.
True
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Which of the following hypotheses could be tested using microautoradiography fluorescence in situ hybridization (MAR-FISH)?
A) Bacteriorodopsin uses light energy to translocate protons. B) Archaea are the main autotrophs in marine water samples taken 300m below the surface of the ocean. C) The microbial community of agricultural soils is more phylogenetically diverse than the microbial community of native prairie soils. D) The ammonia monooxygenase gene is present in members of the phylum Verrucomicrobium.
Cliff has colorblindness and icthyosis, which causes scaly skin. Both traits are X-linked recessive. The probability that he transmits both traits to his sons is
A) 0 B) 1/4 C) 1/2 D) 3/4
The teeth designated by the letter "D" in the
above figure are called a. canines. b. premolars. c. incisors. d. molars. e. none of these
The time it takes for half of a radioisotope's atoms to decay ____.
A. cannot be calculated B. is used to construct the geologic time scale C. is its half-life D. is the same for uranium 238 and carbon 14 E. is highly variable