True, major events like a super volcano's or asteroid strikes can send tons of ash dust and debris into the stratosphere and cause global cooling. <span />
Pepsin is one of three principal protein-degrading enzymes in the
digestive system, the other two being chymotrypsin and trypsin. During
the process of digestion, these enzymes collaborate to break down
dietary proteins to their components, i.e., peptides and amino acids.
A portion of the electromagnetic spectrum is visible to the human eye, but I'm not sure what your options are.
It is a process that causes rock to break into little pieces.
Ciliates move (c) using cilia. It is a group of protozoans. Cilia is an organelle of ciliates. It is a hair-like organelle that helps the ciliate move. It is also used in many ways like food gathering. It could even be used to sweep down food to their central channel.
