Second, teeth have complex shapes, making it possible to identify and distinguish most mammals by their teeth alone. Third, teeth vary in size and form, and mammalian offspring inherit tooth size and shape very much like that of their parents, making teeth amenable to natural selection. Fourth, teeth are good indicators of an animal's diet. Teeth provide an excellent way of tracing animals' development. The first wave from an earthquake to arrive a seismograph is designated the P wave.
S waves travel more slowly, so they get to the seismograph somewhat later.
Operate the XX clock on a size AA battery. The XX clock requires operating for one full year on a size AA battery. The XX clock shall operate for one full year on a size AA battery. The XX clock should operate for one full year on a size AA battery. Do not clean the terminals.