Ecology is not synonymous with environment, environmentalism, natural history, or environmental science. It is closely related to evolutionary biology, genetics, and ethology. An important focus for ecologists is to improve the understanding of how biodiversity affects ecological function.ommunity ecology examines how interactions among species and their environment affect the abundance, distribution and diversity of species within communities. Community ecology is the study of the interactions among a collections of species that inhabit the same geographic area.
Definition: A matryoshka (plural: matryoshki) is a Russian nesting doll. Nesting dolls are often used as symbols of Russian culture, but matryoshka dolls have their origins in similar dolls made in Japan. Matryoshka dolls are popular souvenirs. It's possible to buy very simple matryoshki in sets of five or seven.
If you are holding a currently produced vinyl doll in your hand, changes are it is made of vinyll plastic. Vinyl overtook hard plastic as the main material for doll heads in the late 1950s/early 1960s. One of the most famous vinyl dolls is Barbie; others include today's realistic baby dolls and most baby boomer dolls.he material a doll is made from is determined from the material the doll head is made from, so that a bisque doll has a bisque head but can have a body made of another material. Presented in rough chronological order.