Tim wrote the following characteristics of two landforms. landform a: has marshes and swamps landform b: is formed when limestone bedrock dissolves which statement is most likely correct? landform a is a glacier and landform b is a ridge. landform a is a plateau and landform b is a river. landform a is a wetland and landform b is a karst landform. landform a is a karst landform and landform b is a mountain.

dna damages cause changes in the structure of the genetic material and prevents the replication mechanism from functioning and performing properly. dna damage and mutation have different biological consequences. while most dna damages can undergo dna repair, such repair is not 100% efficient.

sheep is a herbivore animal whereas grasshopper belongs to the class chordates but both of them feed on greens.  

if grasshopper and sheep feeding on a pasture land, i do not think both of them will have any impact on each other. however, the number of the species can make difference. since sheep feed on greens, there is a possibility there left no pasture land for the grasshoppers or they may get extinct.

during the process of dna replication, brdu can replace thymidine and incorporate into the newly synthesized dna, cell proliferation thus can be reflected in the extent of brdu incorporation.