Eukaryotes Flashcards
Eukaryotes have cell enclosed within a _ and a nucleus
Nuclear envelope
Eukaryotic cells typically contain specialized, membrane-bound structures called _
Organelles
Eukaryotes probably evolved through a process called _
Endosymbiosis
Before _ years ago, all organisms thought to have been prokaryotic (range)
1.6-2.1 billion
Archaean cells engulfed bacteria cells, which _
Remained within their hosts
Overtime, a mutually beneficial relationship between _ and their host formed
Engulfed bacterium
Engulfed bacterium known as _
Endosymbiont
Eukaryotes evolved when _
Early prokaryotic cells engulfed bacteria
Engulfed bacteria allow their host to use _
Oxygen
The oxygen allowed for host to release _ for the first time
Energy stored in nutrients
Host protects _
Bacteria
The earliest life forms were _ that lived without oxygen
Prokaryotes
Then oxygen producers rapidly increased oxygen levels in _
Atmosphere
Increased oxygen levels in atmosphere paved way for _ to evolve
Multicellular eukaryotes
Eukaryote cells can organize themselves into complex
Multicellular organisms
(Prokaryotes cannot)
Cells of animals and fungi are _ meaning they cannot produce their own food
Heterotropic
