_ systems have a membrane that separates the internal chemicals from the external chemical environment.
0 Living
O Chemical
both a and b
none of the above

20 points asap! question 1 - in your own words, explain the scientific evidence that supports the plate tectonic theory. question 2 - in your own words, explain why the geological structures in florida are different from the geological structures in colorado.

What is the approximate time of death of the body temperature is 29.4 degrees celsius

Long-period comets come from the oort cloud particles in earth’s atmosphere material from the asteroid belt the kuiper belt