It is thought that the first cells probably arose about _____ years ago.
A) two billion
B) 1.2 billion
C) six billion
D) 500 million
E) 3.5 billion
Correct Answer:
Verified
Q13: During the _ period,jawless fishes were the
Q14: Carl Woese named an ancient aggregate of
Q15: Which of the following was (were)found in
Q16: Which of the following did not occur
Q17: It is thought that eukaryotes probably originated
Q19: Photosynthesis probably originated during the _ eon,and
Q20: Which scientist is given credit for proposing
Q21: The "Age of Fishes" was the _
Q22: For a span of some 300 million
Q23: The first amphibians appeared during the _
Unlock this Answer For Free Now!
View this answer and more for free by performing one of the following actions
Scan the QR code to install the App and get 2 free unlocks
Unlock quizzes for free by uploading documents