In the living bacterial cell, these enzymes destroy the DNA of certain invading viruses (bacteriophages), thus placing a "restriction" on the number of viral strains that can cause infection; the bacterium's own DNA is protected from cleavage by methyl (-CH3) groups, which are added by enzymes at the recognition sites to mask them.
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Seeds and insects
SOLIDIFICATION
Rodents or vermin.
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The pistil is the female sex organ, and the stamen is the male sex organ in plants.
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