NIST subscription sites provide data under the NIST Standard Reference Data Program, but require an annual fee to access. The purpose of the fee is to recover costs associated with the development of data collections included in such sites.IST subscription sites provide data under the NIST Standard Reference Data Program, but require an annual fee to access. The purpose of the fee is to recover costs associated with the development of data collections included in such sites.
The contractile vacuole allows free-living protists to expel extra water. <b>The contractile vacuole allows free-living protists to expel extra water <br /></b>.
Multicellular Plant-Like Protists. Multicellular algae are groups of two or more cells that act as a single organism. If you have seen pond scum growing in water, it is likely that there are multicellular algae growing in there. Similar to unicellular plant-like protists, multicellular algae can be enormous or miniscule.