10 of 25 Which describes commensalism correctly? a symbiotic relationship where one species receives a benefit without impacting the species a symbiotic relationship where neither species receive a benefit an antagonistic relationship between two species a symbiotic relationship where both species receive a benefit a symbiotic relationship where one species receives a benefit, while the other is harmed 11 of 25 An algal bloom is defined as which of the following? Mass feeding on algal cells by zooplankton Mass horizontal migrations of algal cells Mass reproduction of algal cells Mass death of algal cells Mass vertical migrations of algal cells 12 of 25 Which of the following describes dinoflagellates but not diatoms? Dinoflagellates are Fungi. Dinoflagellates have a silica cell wall. Dinoflagellates can be heterotrophic. Dinoflagellates are only found in sandy lagoon habitats. Dinoflagellates produce auxospores. 13 of 25 Which group are characterized by having a shell made of silica (SiO2) ? Ciliates. Diatoms. Stromatolites. Cyanobacteria. Foraminiferans..