In certain undisturbed layers of rock, fossils of horseshoe crabs may be found in the upper layer, and a lower layer contains fossils of trilobites. Trilobites are extinct aquatic arthropods resembling modern horseshoe crabs. What can be inferred from this information?
Horseshoe Crab
Trilobite
A biologist has noted that a species fish in a coral reef off of the coast of Florida have two distinct patterns: blue and yellow, or orange and black. The biologist notes that the orange and black fish do not blend in as well with the surrounding coral as the blue and yellow fish and predators consume them more frequently. Which is a reasonable conclusion?