chapter 27 Flashcards
cytoskeleton
in eukaryotes, an internal protein scaffold that helps cells to maintain their shape and serves as a network of tracks for the movement of substances within cells
symbiont
an organism that lives in closely evolved association with another species
symbiosis
close interaction between species that live together, often interdependently
endosymbiosis
a symbiosis in which one partner lives within the other
Eukarya
the eukaryotes, one of the three domains of life, in which cells have a true nucleus and divide by mitosis
protists
an organism having a nucleus but lacking other features specific to plants, animals, or fungi
algae
a photosynthetic protist
protozoa
a heterotrophic protist
superkingdoms
one of seven major groups of eukaryotic organisms, classified by molecular sequence comparisons
Opisthokonta
a superkingdom that encompasses animals, fungi, and related protists
choanoflagellates
one of a groups of mostly unicellular protists characterized by a ring of microvilli around the cell’s single flagellum
Amoebozoa
a superkingdom of eukaryotes with amoeba-like cells that move and gather food by means of pseudopodia
coenocytic
containing many nuclei within one giant cells; the nuclear divides multiple times, but the nuclei are not partitioned into individual cells
Archaeplastida
a eukaryotic superkingdoms of photosynthetic organisms, includes land plants
Stramenopila
a eukaryotic superkingdom including univellular organisms, giant kelps, algae, protozoa, free-living cells, and parasites
