chapter 25

Question 1

eukaryotes dated back to…

Answer 1

1.8 billion years ago

Question 2

eukaryotes are different bc…

Answer 2

they have well-developed cytoskeletons allowing them to have asymmetrical forms

Question 3

endosymbiosis

Answer 3

a symbiotic relationship in which one organism lives inside the body or cell of another organism

Question 4

endosymbiont theory

Answer 4

mitochondria and plastids use formerly small prokaryotes that began living within larger cells

Question 5

excavata

Answer 5

eukaryotic supergroup. some members have an excavated feeding groove. example: euglenoans

Question 6

SAR clade

Answer 6

eukaryotic supergroup. stramenopiles, alveates, rhizarians

Question 7

stramenphiles

Answer 7

important photosynthesis (brown algae and diatoms)

Question 8

alveates

Answer 8

membrane bound sacs (alveoli) under plasma membrane (dinoflagellates and ciliates)

Question 9

rhizarians

Answer 9

amoebas that move/feed by pseadopodia (forams)

Question 10

tests

Answer 10

porous shells in forams

Question 11

archaeplastida

Answer 11

supergroup that includes red/green algae and land plants. plaids arose when a heterotrophic acquired a cyan bacterial endosymbiont

Question 12

unikonta

Answer 12

supergroup including animals, fungi, and some protists

Question 13

ameobozoans

Answer 13

unikonta. have lobe or tube-shaped pseudopodia. mostly free living

Question 14

mutualist protists

Answer 14

dinoflagellates (nourish coral reefs) and wood-digesting protists in termite gut

Question 15

parasitic protists

Answer 15

plasmodium causes malaria, phytophthora infestans cause potato blight