Birds are a type of reptile
Indicate whether the statement is true or false
TRUE
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Which of the following best describes cyanobacteria?
A. They all can use H2S as a source of electrons for photosynthesis. B. Their photosynthetic pigments are carried in chlorosomes. C. They carry out anoxygenic photosynthesis. D. They carry out oxygenic photosynthesis.
Injury to what region of the vertebral column is usually most threatening?
A) cervical B) sacral C) thoracic D) coccygeal E) lumbar
Which is the correct order for the application of reagents in the Gram stain?
A. Crystal violet, alcohol/acetone, iodine, safranin B. Iodine, safranin, crystal violet, alcohol/acetone C. Crystal violet, safranin, iodine, alcohol/acetone D. Safranin, crystal violet, alcohol/acetone, iodine E. Crystal violet, iodine, alcohol/acetone, safranin
Bacterial cells protect their own DNA from restriction enzymes (endonucleases) by _____
A) adding methyl groups to adenines and cytosines B) using DNA ligase to seal the bacterial DNA into a closed circle C) adding histones to protect the double-stranded DNA D) forming "sticky ends" of bacterial DNA to prevent the enzyme (endonuclease) from attaching