Groups of organisms that may have been separated for millions of years may be brought together in new combinations primarily by
A) shifting weather patterns.
B) changes in ocean currents.
C) plate tectonics.
D) changes in Earth's magnetic fields.
Question 2
Which one of the following is the best analogy to the movements of continents by plate tectonics?
A) A worm tunneling through soil
B) Noodles drifting throughout a cup of chicken noodle soup
C) Air mattresses drifting about on the top of a swimming pool
D) A train running along its tracks
Antifreeze in living organisms
Over nearly 30 years, humans removed many polar bears for a variety of reasons, from a population in
The declining age of menarche over the past 150 years has been measured in many European countries,
Small intestine, micro organisms
Agriculture in 10,000 years ago
Approximately 40 percent of farmers in the United States are 55 years old or older