What do the enzymes in excision repair systems do? A destroy cancer cells
B cut off telomere sections
C replace dna damaged by chemicals
D replace rna primers with dna

Draw the structure of dna nucleotide with adenine as nitrogenous base

Why is it important to study each branch of earth science?

Which of these is an example of land degradation? a. containers designed to store pollutants leak. b. fertilizers provide too many nutrients to crops. c. garbage is buried so the land can be reclaimed later. d. a drought kills all the plants in an area, leaving bare land