rift valley. 1  A long, narrow valley lying between two normal geologic faults. Rift valleys usually form where the Earth's lithosphere has become thin through extension associated with plate-tectonic processes. 2  The deep undersea valley located along the center of the mid-ocean ridge.
Vacuoles and lysosomes have similar functions. Vacuoles in plant cells are in some respects the equivalent of lysosomes in animal cells. The environment inside a vacuole is slightly acid (pH about 5.0) whilst for the rest of the cytosol it is slightly alkaline (about pH 7.2).acuoles and lysosomes have similar functions. Vacuoles in plant cells are in some respects the equivalent of lysosomes in animal cells. The environment inside a vacuole is slightly acid (pH about 5.0) whilst for the rest of the cytosol it is slightly alkaline (about pH 7.2).
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: