White blood cells, also know as macrophages or phagocytes
Nonliving characteristics include the fact that they are not cells, have no cytoplasm or cellular organelles, and carry out no metabolism on their own and therefore must replicate using the host cell's metabolic machinery. Viruses can infect animals, plants, and even other microorganisms.
Bleaching of the coral reefs. This is caused from greenhouse gases in the atmosphere, a main cause for these gases are our vehicles we drive.
