irritability in euglenozoa infographic diagram example euglena move toward light but it avoid direct sunlight

animal arc avoid bacteria biological biology body cell clipart cycle diagram direct drawing education euglena euglenozoa example eyespot gracilis illustration impulse infographic irritability life light locomotion microbiology microorganism microscope motion move movement organism part plant receptor reflex response science stigma stimulation stimuli stimulus structure sunlight toward under unicellular vector viridis