Which grouping includes all of the protists? A) Eukaryotes B) Prokaryotes C) Archaea D) Bacteria
A) Eukaryotes
How might a single-celled euglenoid or dinoflagellate use its flagellum?
A single-celled euglenoid or dinoflagellate uses its flagellum for locomotion, allowing it to move through its aquatic environment.
Which of the following are characteristics of the phylum Ctenophora? A) Bioluminescence B) Radial symmetry C) Ciliary plates D) All of the above
D) All of the above
What is the major difference between protostomes and deuterostomes?
The major difference is in their embryonic development: protostomes develop the mouth first from the blastopore, while deuterostomes develop the anus first.
The three major groups within the Rhizaria include which of the following? A) Foraminifera B) Radiolaria C) Cercozoa D) All of the above
D) All of the above
Which of these answers is true of the Apicomplexa? A) They are all parasitic B) They have a complex life cycle C) They include the malaria-causing Plasmodium D) All of the above
D) All of the above
Which of the following characteristics apply to all species in kingdom Protista? A) Eukaryotic B) Unicellular C) Photosynthetic D) Multicellular
A) Eukaryotic
Which protists lack cilia and flagella?
Amoebas lack cilia and flagella, using pseudopodia for movement instead.
What are protists, and how are they classified within the domain Eukarya?
Protists are a diverse group of eukaryotic organisms that do not fit into the categories of plants, animals, or fungi. They are classified as a paraphyletic group within the domain Eukarya, meaning they include their most recent common ancestor and some, but not all, of its descendants.
Describe the structural diversity found among protists.
Protists exhibit significant structural diversity; they can be unicellular, colonial, or multicellular. Some have unique organelles like pellicles, contractile vacuoles, or ocelloids, and they may possess features such as multinucleation or protective shells.
What is the ecological and medical significance of protists?
Ecologically, protists are often the most abundant organisms in aquatic environments and play key roles as producers, decomposers, or predators. Medically, some protists can cause diseases in humans, such as malaria.