In early ancestors of the modern giraffe, longer necks allowed animals to reach higher tree branches as food. This would lead to ________ in the ancestral giraffe population.
A. disruptive selection
B. sexual selection
C. directional selection
D. stabilizing selection
E. genetic drift
Answer: C
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A scientist discovers a new microbial species. It is a single-celled eukaryote without cell walls. In which kingdom will it likely be classified?
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