6 Questions
Which group includes diatoms and golden algae?
Chrysophytes
What unique feature characterizes the cell walls of diatoms?
Silica composition
Which kingdom forms a link between those dealing with plants, animals, and fungi?
Protista
What type of reproduction do protists primarily undergo?
Cell fusion and zygote formation
Which group is known for forming a link with kingdoms dealing with plants, animals, and fungi?
Protista
'Diatomaceous earth' results from the accumulation of cell wall deposits left by which organisms?
Diatoms
Study Notes
Protista
- All single-celled eukaryotes are classified under Protista, but its boundaries are not well-defined.
- The kingdom includes Chrysophytes, Dinoflagellates, Euglenoids, Slime moulds, and Protozoans.
- Protists are primarily aquatic and form a link with other kingdoms like plants, animals, and fungi.
- As eukaryotes, protistan cells have a well-defined nucleus and membrane-bound organelles.
- Some protists have flagella or cilia.
Reproduction in Protista
- Protists reproduce both asexually and sexually.
- Sexual reproduction involves cell fusion and zygote formation.
Chrysophytes
- Chrysophytes include diatoms and golden algae (desmids).
- They are found in fresh and marine environments, and are microscopic plankton.
- Most chrysophytes are photosynthetic.
- Diatom cell walls are made up of two thin, overlapping shells that fit together like a soap box.
- The walls are embedded with silica, making them indestructible.
- The accumulation of diatom cell walls over billions of years is referred to as 'diatomaceous earth'.
- Diatomaceous earth is gritty and used in polishing, filtration, and other applications.
This quiz provides an overview of the Protista kingdom, discussing the placement of single-celled eukaryotes, the boundaries of the kingdom, and the inclusion of various organisms like Chrysophytes, Dinoflagellates, Euglenoids, Slime moulds, and Protozoans. Learn about the characteristics and link of Protista with other kingdoms.
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