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Warm up 1/30

Last updated about 6 years ago

2 questions

1

1

Question 1

1.

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

 Horseshoe crabs will soon become extinct, due the historical trilobite extinction event.  

 Horseshoe crabs and trilobites are completely unrelated organisms because they do not share any common anatomical traits.  

 Horseshoe crabs may have a common ancestor with trilobites based on the sequential nature of the fossils and their common anatomical traits.  

 Trilobites may have evolved from horseshoe crabs based on the sequential nature of the fossils and their common anatomical traits 

Question 2

2.

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?

  Natural selection favors the orange and black fish.

 The orange and black fish should lay their eggs in the same location as the blue and yellow fish 

 The orange and black fish should change their traits to blue and yellow through Lamarckian  evolution. 

 The blue and yellow fish will survive longer and pass on their traits to their offspring.