10 Jun BIOLOGY 171 – The red squirrel is native to the northern part
Question
1.The red squirrel is native to the northern part of Great Britain. Recently gray squirrels have expanded into this habitat and they feed on the same food sources as red squirrels. Over time, the red squirrel population has declined severely. In some areas in Britain, red squirrels are absent and gray squirrels are abundant. Which of the following explain the phenomenon described above? Choose all that apply.
a. Population Regulation
b. Character Displacement
c. Logistic Growth
d. Density-Independent Factor
e. Niche Differentiation
f. Realized Niche
g. Competitive Exclusion Principle
h. Resource Partitioning
2.Which are shared, derived traits of all theropod dinosaurs, including modern birds? Mark all valid answers.
a. Furcula (wishbone)
b. Semi-lunate carpal bone
c. 4 walking legs
d. Hollow bones filled with air (pneumatic bones)
e. Bipedalism
f. Flight
g. Collagen
3.Mark the answers that accurately place the events in chronological order (older event first and the more recent event second). Choose all accurate answers.
a. First evidence of an oxygen-rich environment, First fossil evidence of eukaryotic cells
b. End-Cretaceous extinction, Oldest fossil evidence of animals
c. Evolution of photosynthesis, First evidence of an oxygen-rich environment
d. A vertebrate group evolves to live on land, groups of plants and fungi evolve to live on land
e. Plants and fungi move to land, end-Cretaceous extinction
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