Answer:
The mitochondria is the powerhouse of the cell
Urochordata is another invertebrate other than hagfish.
The answer is B :),this sentence has to be longer LOL
Answer:
Rocks can be divided into three basic classifications: igneous, sedimentary, and metamorphic. The following tests are used by experts to classify rocks: Hardness Test Minerals are scaled in range from 1 to 10, with 1 being softest and 10 hardest. The method of determining hardness is the scratch test.