Multiple Choice
Which of the following are thought to have occurred because of the increase of oxygen (O2) in the atmosphere during and after the Silurian Period?
A) Conquest of land by arthropods.
B) Conquest of land by arthropods and vertebrates.
C) Increases in animal body sizes and conquest of land by plants.
D) Conquest of land by arthropods and vertebrates, and plants.
E) Conquest of land by arthropods and vertebrates and an increase in animal body sizes.
Correct Answer:
Verified
Correct Answer:
Verified
Q1: The age of a fossil can be
Q2: You have just invented a time machine
Q3: When lipids, phosphates, carbohydrates and RNA were
Q5: Because hardly any oxygen (O<sub>2</sub>) was in
Q6: A protobiont<br>A) has a boundary, or membrane.<br>B)
Q7: John Bernal suggested that prebiotic synthesis of
Q8: To explain the origin of the nuclear
Q9: Which of the following would likely fossilize
Q10: The origin of the mitochondrion and chloroplast
Q11: In eukaryotes, genes involved in transcription and