Were there any eukaryotic cells on Earth 1.5 billion years ago?
A) Yes, they first appear in the fossil record around 3.5 billion years ago.
B) Yes, they first appear in the fossil record around 1.8 billion years ago.
C) No, they do not appear in the fossil record until around 1 million years ago.
D) No, they do not appear in the fossil record until around 500 million years ago.
Correct Answer:
Verified
Q9: Which structure selectively regulates the transport of
Q10: Which of the following is not a
Q11: Which cellular structure is unique to plant
Q12: What is a phospholipid?
A)A special kind of
Q13: Which of the following statements is correct?
A)Prokaryotic
Q15: Which of the following cells contain a
Q16: Which cellular structure is unique to prokaryotic
Q17: Eukaryotes are _.
A)always multicellular
B)often multicellular, sometimes unicellular
C)always
Q18: If a cell had a damaged central
Q19: Which cellular structure is unique to animal
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