restriction endonucleases cut dna at specific recognition sequences and then bond two strands covalently with the same sticky ends.

Ans. : frostbite is when exposure to cold temperatures causes freezing to the skin or other tissues. it most commonly affects the hands, feet, and face. the longer areas are exposed to cold, typically the worse the frostbite. the water temperature used for rewarming a frostbitten part should be : (102 -105) f degrees.

C. definite shape, definite volume. that is a solid.

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