Biology, 22.06.2021 18:30 teagan1716
About 3 million years ago, the Isthmus of Panama (a narrow strip of land connecting North and South America) formed, dividing marine organisms into Pacific and Caribbean populations. Researchers have examined species of snapping shrimp on both sides of the isthmus. Based on the morphological species concept, there appeared to be seven pairs of species, with one species of each pair in the Pacific and the other in the Caribbean. The different species pairs live at somewhat different depths in the ocean. Using mitochondrial DNA sequences, the researchers estimated phylogenies and found that each of these species pairs, separated by the isthmus were indeed each other's closest relatives. The researchers investigated mating in the lab and found that many species pairs were not very interested in courting with each other, and any that did mate almost never produced fertile offspring. Which process led to the formation of the species pairs of Pacific and Caribbean snapping shrimp
Answers: 1
Biology, 21.06.2019 14:40
Are characterized by dry conditions, limited vegetation and wide temperature range. a.) tropical rain forests b.) deserts c.) grasslands d.) none of the above
Answers: 1
Biology, 22.06.2019 07:30
In the respiration-photosynthesis cycle shown above, what are the products of cellular respiration that belong in box 2?
Answers: 3
Biology, 22.06.2019 13:10
Which of the following is not a benefit of genetically modified foods? a.pest-resistant crops b.herbicide-resistant crops c.plants that do not require water?
Answers: 2
Biology, 22.06.2019 15:10
What do your cells need to live? a. carbon dioxide b. carbon c. air d. oxygen
Answers: 2
About 3 million years ago, the Isthmus of Panama (a narrow strip of land connecting North and South...
English, 23.10.2021 09:20
English, 23.10.2021 09:20
Business, 23.10.2021 09:20
Computers and Technology, 23.10.2021 09:20
Health, 23.10.2021 09:20
Social Studies, 23.10.2021 09:20
Physics, 23.10.2021 09:20
Computers and Technology, 23.10.2021 09:20
Mathematics, 23.10.2021 09:20
Health, 23.10.2021 09:20
Physics, 23.10.2021 09:20