Answers to the "Blasts from the Past" questions may be similar to the
following:
Organisms live in both and the ecosystems are found within the biosphere.
Both are ways that scientists answer questions. A hypothesis is smaller in
scale than a theory beacuse it requires one experiment while a theory relys
on many.
Both are part of a controlled experiment. The independent variable is what is
changed or manipulated while the constant in unchanged.
What is natural selection, a concept of evolution, based upon?
In what form do some scientists record their observations?
What is the sequence of DNA is refered to as?
