Which structure is most likely used for reproduction

What will happen to the amount of food available as a pondwater ecosystem ages

The periodic table houses noble gas elements in group 18. these elements are highly stable and rarely react with any other elements. what is one possible reason for the stability of the noble gas elements? a. they easily form covalent bonds. b. the compounds that they form with other elements are very unstable. c. their outermost shell has the maximum number of electrons that it can hold. d. they require less activation energy.

Answer ! the dating process that places geologic events in proper sequence is referred to as: a. radiometric dating b. relative dating c. numerical dating d. temporary dating