A rift valley is a lowland region formed by the interaction of Earth's tectonic plates. This small rift valley has a typical formationâlong, narrow, and deep. It was formed by the Thingvellir rift, where the North American and Eurasian tectonic plates are tearing, or rifting, apart over a hotspot on the island of Iceland.
A vacuole (/ËvaekjuËoÊl/) ËvÃ¦kjuËoÊl is a-membrane bound organelle which is present in all plant and fungal cells and some, protist animal and bacterial. cellshe function and significance of vacuoles varies greatly according to the type of cell in which they are present, having much greater prominence in the cells of plants, fungi and certain protists than those of animals and bacteria. In general, the functions of the vacuole include:
1 a clear or fluid-filled space or cavity within a cell, such as occurs when a droplet of water is ingested by the cytoplasm. 2 a small space in the body enclosed by a membrane, usually containing fat, secretions, or cellular debris. vacuolar, vacuolated, adj.