BIOSYSTEMATICS Flashcards
Simple cells with DNA strands floating in a capsule
Prokaryotes
Complex cells that have compartments with special jobs and DNA is a nucleus
Eukaryotes
Provide records of life forms that once existed
Fossils
Uses mutation rate of biomolecules to deduce the time when two life forms diverged
Molecular clocks
A record of life and events on Earth
Geologic Time Scale
Largest unit of time
Eon
A unit of time shorter than Eon
Era
Give the proper arrangement of a time scale (from largest unit to smallest)(Capital letters)
EON
ERA
PERIOD
EPOCH
Ancient Eon
Archea
Early life (4,500 - 2500 mya
Proterozoic
Early life (2500 - 540 mya
Proterozoic
Ancient life (540-248 mya
Paleozoic
Middle life (248-65 mya
Mesozoic
Recent life (65 mya to present
Cenozoic
Most recent epoch
Halocene
When did life begin?
3.8 billion year ago
Where did life first developed?
Undersea alkaline vents
Invasion of life on land began….
1.5 billion years ago
Layers of cyanobacteria trapped in sediments
Stromatolites
Bacteria responsible for the production of oxygen
Photosynthetic bacteria
One of the first Eukaryotic cells
Acritarch
A coiled tube life form that appeared in the sea
A. Gypania
B. Gyrania
C. Colania
D. Grypania
D
Algae evolved sexual reproduction approximately…
A. 1300 mya
B. 1299 mya
C. 1200 mya
D. 2300 mya
c
A red algae, which fossil was found in Canadian rocks
Bangiomorpha