International Operations works with the Department of Homeland Security and other U.S. agencies to vet participants in International Visitors Program events nationwide.
Life cycle. Life cycle means the stages a living thing goes through during its life. In some cases the process is slow, and the changes are gradual. Humans have various steps during their lives, such as zygote, embryo, child and adult. The change from child to adult is slow and continuous.
In biology, a biological life cycle is a series of changes in form that an organism undergoes, returning to the starting state. The concept is closely related to those of the life history, development and ontogeny, but differs from them in stressing renewal. Transitions of form may involve growth, asexual reproduction, or sexual reproduction. In some organisms, different generations of the species succeed each other during the life cycle. For plants and many algae, there are two multicellula