When testing a pure substance for its properties, some of the test result in the sample of being changed into another substance. Testing for which of these properties. May result in the sample substance being changed into a different substance

Fission of uranium-235 products energy and a. isotopes of smaller elements b. isotopes of larger elements c. lighter isotopes of uranium d. heavier isotopes of uranium

Although respiratory organs vary across different organisms, they all contain respiratory surfaces that have a large surface area and are extremely thin. explain why having an extremely thin respiratory surface with a large surface area is advantageous for the process of gas exchange

The excretory system,need answers for all: )