According to the phylogeny presented in this chapter, which protists are in the same eukaryotic supergroup as plants?a. green algaeb. dinoflagellatesc. red algaed. both A and C

Many species of red algae are adapted to deeper water due to the fact that __________.

The most important primary producers in marine ecosystems are .

Which group is incorrectly paired with its description?a. diatoms—important producers in aquatic communitiesb. red algae—eukaryotes that acquired plastids by secondary endosymbiosisc. apicomplexans—unicellular parasites with intricate life cyclesd. diplomonads—unicellular eukaryotes with modified mitochondria

What is the role of PEP carboxylase in C4 and CAM plants?a. It fixes CO2 into an organic acid.b. It produces ATP for the Calvin cycle.c. It replaces rubicso in the Calvin cycle.d. It releases CO2 from organic acids.

How can dinoflagellates be harmful to humans?a. They are transmitted by mosquitoes and cause malaria.b. They produce toxins that can be absorbed by clams and other shellfish which, when eaten by people, can lead to paralytic shellfish poisoning.c. They cause amoebic dysentery which leads to severe diarrhea and dehydration.d. They are transmitted by tsetse flies and cause 'sleeping sickness.'

How can dinoflagellates be harmful to humans?a. They are transmitted by mosquitoes and cause malaria.b. They produce toxins that can be absorbed by clams and other shellfish which, when eaten by people, can lead to paralytic shellfish poisoning.c. They cause amoebic dysentery which leads to severe diarrhea and dehydration.d. They are transmitted by tsetse flies and cause 'sleeping sickness.'

Which pair of protists has support structures composed of silica?a. dinoflagellates and diatomsb. diatoms and radiolariansc. radiolarians and foramsd. forams and amoebozoans

Which of the following members of the SAR supergroup is incorrectly paired with its clade?a. stramenopiles—brown algaeb. alveolates—parasites such as Plasmodiumc. alveolates—dinoflagellatesd. Rhizaria—diatoms