An energy pyramid shows the amount of
available at each feeding level in an ecosystem

What is the primary goal of human communities?

At which location in earth’s interior does the top density continue to increase as thickness decreases?

What does polymerase chain reaction (pcr) do? o a. separates dna fragments by size o b. cuts a dna sample into fragments o c. provides an overall picture of a person's chromosomes o d. makes more copies of a sample of dna