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Flashcards in Protist Deck (17)
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1
Q

Eukarya

A

1 of 3 taxonomic domains of life

  • unicellular orgs (most protist/yeasts)
  • multicellular orgs (fungi, plants, animals)
  • membrane-bound cell nucleus, numerous organelles & extensive cytoskeleton
  • large cells
  • undergo meiosis
  • most reproduce sexually
2
Q

protist

A

any eukaryote that is not green plant, animal or fungus

  • diverse paraphyletic group
  • most = unicellular
  • some = multicellular or form aggregations
  • tend to live in water surrounded environments
3
Q

malaria

A

human disease caused by 5 species of protist “Plasmidium”

- passed to humans by mosquitoes

4
Q

primary producers

A

org that creates own food by photosynthesis or related inorganic compounds

  • food source for other species
  • aka autotroph
5
Q

plankton

A

drifting orgs in aquatic environment

(ie) animals, plants, archaea, bacteria

6
Q

food chain

A

pathway of energy flow

  • subset of food web
  • primary producer -> secondary producer -> decomposer
  • describes nutritional relationships btwn orgs
7
Q

global carbon cycle

A

worldwide movement of carbon among terrestrial ecosystems, oceans & atm

8
Q

flagellum

A

long, cellular projection that undulates (eukaryotes) or rotates (prokaryotes) to move through environment

pl. flagella

9
Q

endosymbiosis theory

A

mitochondria originated when bacterial cell took up residence inside another cell
- aka primary endosymbiosis (3 membranes)

“inside-living-together”

10
Q

symbiosis

A

any close & prolonged physical relationship btwn individuals of 2 diff. species

11
Q

endosymbiosis

A

association btwn orgs of 2 diff. species in which one lives inside cells of other

12
Q

phagocytosis

A

uptake by a cell of small particles or cells by invagination & pinching off plasma membran to form small, membrane-bound vesicles
- one type of endocytosis

13
Q

pseudopodia

A

temporary bulge-like extension of certain protist cells
- used in cell-crawling & ingestion of food

pl. pseudopodium

14
Q

decomposer

A

org whose diet consists mainly of dead organic matter (detritus)
- aka detritivore

(ie) various bacteria, fungi, protists & animals

15
Q

detritus

A

dead organic matter layer

- acquires @ ground level or seafloors/lake bottoms

16
Q

parasite

A

org that lives on a host species (ectoparasite) or in a host species (endoparasite) & damages host

17
Q

amoeboid motion

A

cellular movement involving actin filaments
- pseudopodia stick to substrate & pull cell forward

(aka) cell crawling