1. Compare the structure of the two island groups' ecosystems. First, calculate the average fish biomass in each trophic level for each island group. Then use these values to draw
biomass pyramids on graph paper. Draw the pyramids so that the levels are proportional
to the data. (Hint: Draw the smallest level first.)
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a community that experiences major changes undergoes progress

the relative atomic mass of an element is the mass of one atom of that element, relative to 1/12th of the mass of a  1212c atom. to convert to an absolute mass in kg, it is necessary to multiply by  1.661×10−271.661×10−27.

the relative atomic mass is roughly equal to the number of neutrons, plus the number of protons, in the nucleus of the atom.

for elements with more than one stable isotope (different types of nucleus with different numbers of neutrons but the same number of protons), the quoted mass is usually the average mass, weighted by the relative abundance of the different isotopes.

population. population is the number of people or animals in a particular place. an example of population is over eight million people living in new york city.

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