Multiple Choice
When comparing primitive Earth to modern Earth, we note that
A) primitive Earth had more ozone.
B) modern Earth has more ultraviolet light.
C) modern Earth is cooler.
D) there is less oxygen on modern Earth.
Correct Answer:
Verified
Correct Answer:
Verified
Q15: The first terrestrial organisms are found in
Q16: The first photosynthetic organisms probably<br>A) lived in
Q17: When we speculate about the origin of
Q18: The spontaneous formation of organic molecules does
Q19: Microspheres<br>A) have a boundary membrane.<br>B) are formed
Q21: The first cells were probably<br>A) Eukaryotic.<br>B) Archaea.<br>C)
Q22: Earth has supported life for approximately<br>A) 20
Q23: Which of the following plays an important
Q24: It is speculated that one of the
Q25: A sphere formed by organic molecules surrounded