Read the National Geographie artiele \"Digging Utah\'s Dinosaurs\" by Peter Mill

Question

Read the National Geographie artiele "Digging Utah's Dinosaurs" by Peter Miller, with photographs by Cory Richards. The article is posted on Isidore in pdf format. Answer questions 1-3 using information from clas and/or your textbook 1. (A) What is allopatric speciation? (B) Give an example of a geugraphic barrier 2. (A) What is sympatrie speciation? (B) Esplain how this can happen via sexual selection. (C) Explain how this can happen vía habitat differentiation, (1 ½ pt) 3. (A) What is reproductive isolation? (B) Why must populations become reproductively isolated for speciation to occur? (1 pt) 3. The fossil hunters in the article are looking for fossils from a land mass called Laramidia. (A) Describe where Laramidia was and when the fossils date to. What period was this? (B) What types of fossils have been found there? (1 ½ pt)

Explanation / Answer

1) a) Allopatric speciation is speciation that happens when two populations of the same species become isolated from each other due to geographic changes to an extent that prevents or interferes with genetic interchange with each other.

b) Movement of continents or continental drift is an example of geographic barrier.  

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