phototactic

Her first publication was Phototactic vertical migration in marine dinoflagellates.

This organism also exhibits phototactic movement.

Fish use NIR to capture prey and for phototactic swimming orientation.

K. brevis is phototactic and negatively geotactic.

Many phytoflagellates, e.g. Euglena, and the chloroplasts of higher plants positively phototactic, moving towards a light source.

Phototactic responses are observed in many organisms such as Serratia marcescens, Tetrahymena, and Euglena.

The cell has chemotactic and negative phototactic capabilities in this phase, meaning that it is able to move towards nutrients and away from dangerous substances and light.

Second, with the current putative evidence (say, stromatolites with phototactic morphology and microscale evidence for photosynthesis @ 3.5 Gya) you can make a testable hypothesis including recurrence.

Apart from at the highest temperatures, it is also positively phototactic (is attracted to sunlight), while other species are negatively phototactic (move away from bright light).

The eyes utilize photo-sensitive opsin proteins expressed in neurons to communicate information of the light environment to the nervous system, while sponge larvae use pigment ring eyes to mediate phototactic swimming.

Zoospores of Rhizophydium littoreum, a parasite of marine green algae, are positively phototactic toward blue light, a mechanism that might assure that zoospores swim to the photic zone where its host resides.