Which organisms are the oldest to most recent, based on scientific views?
a.
cyanobacteria, birds, sea scorpion, saber-toothed cats
b.
birds, saber-toothed cats, sea scorpion, cyanobacteria
c.
cyanobacteria. sea scorpion, saber-toothed cats, birds
d.
cyanobacteria, sea scorpion, birds, saber-toothed cats

Asun-sized star will spend most of its lifetime as a: white dwarf red giant protostar main-sequence star

Which changes of state do the labels represent? a: b: c:

Which statements describe the movement of ocean currents around the globe? check all that apply. strong winds force warm water to sink to the ocean floor. the coriolis effect causes warm and cold water to mix. cool dense water sinks to the ocean floor. warm water replaces cool surface water. wind blowing parallel to the shore causes upwelling of cool water.