Secondary endosymbiosis

Chapter 27
By: Isabella Cox
AP Biology
27.1 How did the Procaryotic ecell become a Eukaryotic cell?
27.2 What makes protists diverse?
27.3 How do protists affect the world around them?
27.4 How do protists reproduce?
27.5 What Are the evolutionary relationships among Eukaryotes?
How did the Procaryotic become a Eukaryotic
• Endosymbiosis occurred changing
the prokaryotic cell
Section 27.1 Vocab
• Primary endosymbiosis is when a
eukaryotic cell engulfs another living
Section 27.1 Vocab
• Secondary endosymbiosis is
when a eukaryote cell engulfs
another eukaryote cell
What makes protists diverse?
different niches
ways of moving
different vacuoles
different cell surfaces
Section 27.2 Vocab
• Pseudopods- a temporary, soft extension of the cell body that is sued in
location, attachment to surfaces, or engulfing particles
How do protists affect the world around them?
• There can be positive or negative
affects on the world
• Malaria is a deadly
• Still rely on the use of ancient
How do protists reproduce?
• Binary fission- equal splitting of one cell into two, with mitosis followed by
• Multiple Fission- splitting one cell into multiple cells
• Budding- the outgrowth of a new cell from the surface of an old one
• Spores- the formation of specialized cells that are capable of developing into
new organisms
Section 27.4 Vocab
• Conjugation- when two paramecium line up and fuse in the oral groove of
the body
• Haplontic- a type of life cycle in which the zygote is the only diploid cell
and mitosis occurs only in haploid cells
• Diplontic- a type of life cycle in which gametes are the only haploid cells
and mitosis occurs only in the diploid cells
What are the evolutionary relationships among
• There a different groups such as Chromalevolates, Plantae, Rhizaria
Section 27.5 Vocab
• Chromalveolates- group of photosynthetic organisms
• Dinoflagellates- unicellular, two flagella, they take on different forms
depending on their enviroments
• apicomplexians- a mass of organelles contained in the tip of a cell
Sadava, David, et al...Life: The Science Biology, Ninth Edition. n.a.: Sinaur Associates, Inc, 2011.

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