Question

question 7 of 15
which was used to dispute continental drift?

a. mesosaurus fossils

b. magnetic striping on the ocean floor

c. seafloor spreading

d. the existence of land bridges

Explanation:

To solve this, we analyze each option:

• Option A: Mesosaurus fossils are found on different continents, supporting continental drift (as they couldn't cross oceans), so not a dispute.
• Option B: Magnetic striping on the ocean floor supports seafloor spreading, which in turn supports continental drift (as part of plate tectonics), so not a dispute.
• Option C: Seafloor spreading is a mechanism that explains how continents move, supporting continental drift, so not a dispute.
• Option D: The idea of land bridges was proposed to dispute continental drift. Scientists who didn't accept continental drift suggested that land bridges (now submerged) allowed species to move between continents, instead of continents moving.

Answer:

D. The existence of land bridges