Yes, this is true, and it is actually one of the organisms driving evolution! Some organisms develop mutations that are actually beneficial (better eye-sight, for example) and they're more likely to pass those to their children that individuals without those mutations!
You can tell if matter is conserved if the substance changes . If the substance changes then matter has been conserved .
"If blood temperature rises too high<span>, this is sensed by specialized neurons in the hypothalamus of the brain. ... As these blood vessels dilate, more blood flows close to the </span>body<span> surface and excess heat radiates from the </span>body<span>."</span>
