What does the half-life of a radioisotope represent? O A. It represents the amount of energy produced by the isotope's
radioactive decay.
O B. It represents the time it takes for half of the material to decay to a
daughter element.
O c. It represents the type of radiation that is being emitted by the
radioactive material.
D. It represents how long the radioactive material has been in
existence in that form.

Water's surface tension and heat storage capacity are accounted for by its a) orbitals b) weight c) hydrogen bonds d) mass e) size

Ants live on acacia trees in south america. the ants feed on sugars secreted by the trees. the trees provide room for the ants to live. the ants sting any other insect or animal that comes to eat the trees. what type of relationship is this?

You exhale co2 which is produced during cellular respiration.  co2 combines with the water in your blood's plasma to make up one half of the body's most important buffer pair, carbonic acid.  the more physical activity you engage in, the more co2 your body is producing.  you can see this by putting some of the cabbage indicator in a glass and then blowing bubbles into it through a straw.  can you see a change in the color of the indicator?