Multiple choice Which among the following algae is capable of reducing mercury levels in human beings? Palmaria palmata Ulva lactuca Chlorella Chondrus crispus Aphanizomenon flos-aquae Reveal answer Fill a bubble to check yourself C Correct answer Explanation Chlorella is very popular in Japan. It is also used as a nutritional supplement with possible effects on metabolic rate.It can reduce mercury levels in humans by chelation of the mercury to the cell wall of the organism.