Africa, Asia, South America, and Antarctica share some patterns of primitive (fossil) plants and early reptiles, but do not have similar mammal populations. These findings
A. suggest that a pattern of land bridges existed at different times in geological history.
B. suggest that the mammals evolved earlier while continents were joined, but plants and reptiles radiated into diverse groups after separation.
C. cast serious doubts upon the theory of continental drift and fused land masses.
D. are an unsolved puzzle probably due to the random nature of biological evolution.
E. suggest that the earlier plants and reptiles evolved while continents were joined, but mammals radiated into diverse groups after separation.
Answer: E
You might also like to view...
Which of the following was derived from an ancestral cyanobacterium?
A) chloroplast B) mitochondrion C) flagella D) mitosome
Which of these is NOT a lipid?
A. phospholipid B. cholesterol C. steroids D. glycogen E. wax and oils
Gene transfer that requires cell-to-cell contact is
A. transformation. B. competency. C. conjugation. D. functional genomics
What are bacteroids?
a. specialized nitrifying bacteria b. small buds from ammonifying bacteria c. specialized bacteria that help some plant roots absorb phosphorus d. enlarged and immobilized nitrogen-fixing bacteria