To calculate the relative mass of an element you need to know both the mass of the individual isotopes of the element, and their
A percent occurrence.
Brelative charges.
C relative size.
D none of the above.

Development of new communities in disturbed environments, such as a burned or a clear cut forest, is called

Which of these best describes what occurs during cytokinesis? a) the chromosomes are separated b) the cell begins to divide by replicating the chromosomes c) the cytoplasm is divided between the two new daughter cells d) the nucleus opens to allow the chromosomes to enter the cytoplasm

What function does a limb serve in each animal how are the limb bones of the four animal similar based on the similarities what can be inferred about the evolution of the poor animals