Multiple Choice
When did the first eukaryotic cell form?
A) About a billion years after the first prokaryotic cell was formed
B) About the same time as the first prokaryotic cell was formed
C) About a billion years before the first prokaryotic cell was formed
D) There is no evidence to suggest when the eukaryotic cells formed in relationship to prokaryotic cells.
Correct Answer:

Verified
Correct Answer:
Verified
Q7: Viruses that infect bacteria are called _.<br>A)
Q22: Which protective structure forms to protect certain
Q23: Medicine that prevents viral infections is a(n)_.<br>A)antibody<br>B)antibiotic<br>C)vaccine<br>D)prion
Q24: There are more helpful types of bacteria
Q26: Which are the smallest,least complex cell types?<br>A)Animal
Q28: What is the leading scientific theory on
Q29: Which specific cells are infected by the
Q30: What might be the advantage to a
Q40: Describe all the possible forms of nucleic
Q41: Which of the following infects only plants?<br>A)Virus<br>B)Prion<br>C)Viroid<br>D)Capsid