wrecking crew: old building:: lysosome: damaged organelle.
A lysosome is an organelle that contains enzymes that break down and digest unneeded cellular components, such as a damaged organelle.
Cladistics is based on the shared characteristics between organisms and their network of evolutionary relationships
The bonds that hold H2O2 together break apart and the atoms are rearranged to form water (H2O) and oxygen (O2) molecules. This happens slowly in store-‐bought hydrogen peroxide, so even in dark bottles, it will 'expire' in a year, or less if it's opened. ... And higher concentrations of H2O2 produce more oxygen.
White blood cells fight disease
A relatively constant internal physical and chemical conditions that organisms maintain.