Why can the deletion of a single nitrogen base in DNA due to a mutation be harmful to an organism? A) Deletion causes chromosomes to join the wrong chromosome.

B) Nearly every amino acid in the protein will change after the deletion of a base.

C) Deletion causes a gamete to have an extra chromosome.

D) Such a mutation causes one chromosome to break off or become fragile.

The table presents the average day and night temperatures in five cities. it also reveals whether a city receives substantial rainfall (wet climate) or little rainfall (dry climate). which city’s rocks are likeliest to experience frost wedging, and why? a) city a because the consistently subzero temperature would prevent water from melting b) city b because it is a wet region and the temperature fluctuates around the freezing point c) city c because it receives plenty of rain fall and the weather is moderately cool d) city d because the hot and dry weather would cause rocks to absorb water