Modern invertebrates first appear in the fossil record during the:
A) Precambrian era.
B) Silurian period.
C) Cambrian period.
D) Devonian period.
E) cyanobacteria.
Correct Answer:
Verified
Q19: The outer boundaries of laboratory-created vesicles are
Q20: The theory that life began in the
Q21: The earliest photosynthetic organisms obtained hydrogen from:
A)water.
B)methane.
C)chlorophyll.
D)hydrogen
Q22: The first multicellular eukaryotic fossils were:
A)algae.
B)fungi.
C)cyanobacteria.
D)reptiles.
E)amphibians.
Q23: The earliest fossil organisms resemble modern:
A)protists.
B)green algae.
C)eukaryotes.
D)prokaryotes.
E)protocells.
Q25: To be classified as a eukaryote, an
Q26: If the early Earth's atmosphere contained little
Q27: Probably the greatest advantage for the original
Q28: The earliest photosynthetic organisms:
A)probably did not produce
Q29: The earliest multicellular animals in the fossil
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