The appearance of _____ on Earth due to the action of photosynthetic bacteria occurred about 2.7 billion years ago.
A) water
B) carbon dioxide
C) ATP
D) oxygen
E) iron
Correct Answer:
Verified
Q5: The earliest cells most likely _.
A) were
Q6: Scientists hypothesize that _ served as a
Q7: Humans acquire their first microorganisms during _.
A)
Q8: Scientific evidence suggests that Earth had cooled
Q9: Until the early 1800s, scientists believed that
Q11: Experiments like those performed by Stanley Miller
Q12: _ are dome-shaped structures composed of layers
Q13: DNA is more stable than RNA for
Q14: What are the four main organic subunits
Q15: Evidence supporting the lack of oxygen on
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