The best answer is C. Tailings are dangerous because they can release toxic elements into the groundwater or surface water. Tailings are the waste materials after the process of extracting the valuable part in a mine. These waste materials have a big potential to destroy the environment because they can release toxic substances which include arsenic and mercury. These tailings can contaminate water bodies.
Answer:
A gene is the physical and functional unit of heredity. Genes are made up of DNA. DNA are made up of 4 letters. those 4 letters "write the code in you".<u>Some</u> genes act as instructions to make molecules called proteins.
A student who earns a "well qualified" score on an AP exam would receive a <u>four.</u>
AP exam scores range is from 1 to 5.
