Why are polar bears listed as a threatened species?

Explain why scientists use shared characteristics to make cladograms.

1) this is the structure in the cell nucleus that houses a cell's genetic information

When 225mg of anthracene, c14h10(s), was burned in a bomb calorimeter the temperature rose by 1.75k. calculate the calorimeter constant. by how much will the temperature rise when 125mg of phenol, c6h5oh(s), is burned in the calorimeter under the same conditions? (δch< (c14h10,s)=–7061 kj mol−1.)