31. It can be used to do mechanical work, such as rotating bacterial flagella . 32. In 1899, Luther created the group Heterokontae for green algae with unequal flagella . 33. For example, the early concept was the trivial homology of flagella of rhizopods. 34. One flagella , the tinsel flagella, is generally longer and covered with bristles. 35. One flagella, the tinsel flagella , is generally longer and covered with bristles. 36. Brown alga zoids have the same two basic flagella discussed in the heterokont section. 37. The cells have peritrichous flagella which enable motility. 38. Entering darkness signals the cell to reverse flagella rotation direction and reenter the light. 39. The males with longer flagella and smaller heads had higher within-pair paternity. 40. It is rod-shaped, peritrichous flagella .