Restriction endonucleases are obtained from various species of bacteria.
Answer the following statement true (T) or false (F)
True
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The rRNA gene sequences of hyperthermophilic Archaea and Bacteria have diverged ________ over time, likely due to ________
A) relatively little / strong constraints on sequence changes at higher temperatures B) substantially / higher mutation rates at higher temperatures C) relatively little / low mutation rates in these ancient organisms D) substantially / DNA damage at higher temperatures
The functions of vascular tissue in plants include
_____ physical support of the plant. _____ photosynthesis. _____ transport of water. ______ transport of minerals. _____ transport of organic compounds. _____ transport of gametes.
Which vertebrae are fused together forming a single unit?
B) Cranial
C) Thoracic
D) Sacral
A pathogen is a disease-causing organism, but not all pathogens are alike. Some pathogens are more dangerous than others. When describing the relative ability of a pathogen to cause disease, we are considering its ________
A) emergence B) infectivity C) virulence D) pathogenicity