Heart rate or pulse I think.
The food chain ?
Sun
Primary producers
Primary consumers
Secondary consumers
Tertiary consumers
<span>A sequence of organisms through which energy is transferred, beginning with the primary producer, is a "Food Chain"
Hope this helps!</span>
Answer : In radioactive decay, the half-life is the length of time after which there is a 50% chance that an atom will have undergone nuclear decay. It varies depending on the atom type and isotope, and is usually determined experimentally.
hope it will help you
