Which of the following statements is false?
protists are eukaryotes.
some protists can conduct photosynthesis.
protists can reproduce by fission.
protists are all unicellular.

The incorrect statement is that protists are all unicellular.

Explanation:

Not all the protists are unicellular, there are some species of protists, which are multicellular too. The kingdom Protista comprises unicellular as well as eukaryotic species. The kingdom Protista is very diverse and comprises almost all the kinds of species beginning from unicellular species to multicellular, non-photosynthetic to photosynthetic and others. Some of the unicellular protists are paramecium, euglena, amoeba, while some of the multicellular protists are slime molds, kelp, and red algae.

the relative standard reduction potential of the half-cell in which reduction occurs; more positive than the other half-cell. reduction is a chemical process in which electrons are added to an atom or an ion; it always occurs accompanied by oxidation of the reducing agent.