topic 11

Question 1

origin of eukaryotes

Answer 1

first appeared 1.8bya, after the great oxidation event

Question 2

characteristics of eukaryotes

Answer 2

membrane-bound nucleus and linear chromosomes, membrane-bound organisms, specialized (mitochondria, chloroplasts), much larger, cytoskeleton for shape changes/movement/material transport (phagocytosis), dynamic membranes, sexual reproduction (meiosis and fertilization)

Question 3

endosymbiosis

Answer 3

sybiosis between two species where one lives inside another’s cells/tissues