What does the binomial system of naming species consist of?
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Use the binomial system of naming species. Describe and use the hierarchy of classification — kingdom, phylum, class, order, family, genus and species. Extended candidates explain how morphology, anatomy and DNA base sequence comparisons inform classification.
What does the binomial system of naming species consist of?
State the correct order of the classification hierarchy from largest to smallest grouping.
[2 marks]Two species share a kingdom, phylum, class, order and family but belong to DIFFERENT genera. What does this tell you?
Modern classification uses morphology, anatomy AND DNA base sequences to compare species.
Explain how comparing DNA base sequences helps biologists classify species. Suggest TWO advantages over only using morphology.
[3 marks]Which of the following is the correctly written binomial name?
Two organisms are classified as follows: Organism X: Kingdom Animalia, Phylum Chordata, Class Mammalia, Order Carnivora, Family Felidae, Genus Panthera, Species leo. Organism Y: Kingdom Animalia, Phylum Chordata, Class Mammalia, Order Carnivora, Family Felidae, Genus Panthera, Species tigris.
Identify the binomial names of organisms X and Y.
[2 marks]State the LOWEST level of classification at which X and Y differ.
[1 mark]Sharing a genus suggests these two organisms are closely related. State ONE biological consequence of this close relatedness.
[1 mark]A species is best defined biologically as a group of organisms that can interbreed to produce fertile offspring. Explain why mules (the offspring of a donkey and a horse) demonstrate that donkeys and horses are different species.
[2 marks]Dolphins (mammals) and sharks (fish) both have streamlined bodies and dorsal fins, yet they are classified in completely different classes. What does this tell us about classification?