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).
What does a vacuole do? A: Vacuoles vary in function between organisms and even within the same cell, but the most frequent use is the storage of water or nutrients. A vacuole is really a general-purpose, empty membrane organelle that is filled with whatever the cell needs to keep separate from the rest of the cytoplasm. As such, different vacuoles also store waste or even toxins, and some organisms have other uses for them.