1.2. Concept and uses of classification systems
A subsection of Biology, 0610, through 1. Characteristics and classification of living organisms
Listing 10 of 104 questions
The classification of giant pandas, Ailuropoda melanoleuca, is debated by many scientists. shows a giant panda eating bamboo plants. shows a red panda, Ailurus fulgens, and a polar bear, Ursus maritimus. red panda eating bamboo plants polar bear eating fish State one dietary component that is more likely to be found in bamboo plants than in fish. State two features, visible in and , that identify the three animals as all belonging to the same vertebrate group. DNA can also be used to classify species. Molecular biologists compared the DNA base sequences of eight species from the same vertebrate group. They used the differences to draw a classification diagram. shows the classification diagram for these eight species. The shorter the horizontal distance from two species to the branching point that they share, the more similar their DNA sequences are and the more closely the two species are related. The scale on shows the time at which the molecular biologists estimate that each branching point occurred. red panda ferret giant panda polar bear wolf tiger human mouse million years ago Morphology can also be used to classify species. Some scientists think that morphology suggests that the giant panda is more closely related to the red panda than it is to the polar bear. Discuss the evidence for and against the giant panda being more closely related to the red panda than it is to the polar bear. Use the information in , and in your answer. State one other type of evidence that is used to classify species.
0610_s21_qp_42
THEORY
2021
Paper 4, Variant 2
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