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Plant-like ProtistsMr. Chapman
Biology 20
DiatomsUnique Plant-like Protists With
Various Structures
DiatomsMore Pictures of Diatoms
Also see page 583 of textbook
• Many plant-like protists are free living aquatic organisms. Together with certain photosynthetic bacteria, they make up the group called phytoplankton.
• Phytoplankton are the basis of the aquatic food chain, and are necessary for ecological stability in the ocean.
• Some plant-like protists are unicellular and some are multicellular, such as seaweeds.
Some Plant-Like Protist Details
Other plant-like protists live in colonies – they exist as unicellular organisms, but always travel together in groups.
Algae are plant-like protists.
Remember that our example from previous classes of plant-like protists were euglena. That is the only plant-like protist you will be expected to remember structurally.
Plant-like Protists Continued...
Haploid Cells (1n)
• Haploid cells contain half the chromosomes of a complete cell. Also called gametes.
• Examples include sperm and eggs in humans.
Diploid Cells (2n)
• Diploid cells contain a full set of
chromosomes.
• All the other cells in the human body besides sperm and
egg are diploid.
Important Forms of Cells
Plant-Like Protists Reproduce Sexually and Asexually