Multiple Choice
Women played a crucial role in the domestication of plants because they:
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21. Evolution
Introduction to Evolution and Natural Selection
Multiple Choice
Which of the following best describes the evolutionary relationship between bears and dogs?
A
Bears and dogs share a common ancestor and both belong to the order Carnivora.
B
Bears evolved directly from dogs during the last ice age.
C
Bears and dogs are not related and belong to entirely different animal classes.
D
Bears and dogs are both marsupials and share a recent common ancestor.
Verified step by step guidance1
Step 1: Understand the concept of evolutionary relationships. Evolutionary relationships are determined by shared ancestry, which is often revealed through genetic, anatomical, and fossil evidence. Organisms that share a common ancestor are grouped into the same taxonomic categories.
Step 2: Identify the taxonomic classification of bears and dogs. Both bears and dogs belong to the order Carnivora, which includes carnivorous mammals. This indicates that they share a common ancestor within this order.
Step 3: Evaluate the incorrect options. Bears did not evolve directly from dogs during the last ice age; evolution is a gradual process that occurs over millions of years. Additionally, bears and dogs are not marsupials; marsupials are a distinct group of mammals characterized by their pouch for carrying offspring.
Step 4: Clarify the relationship between bears and dogs. While they share a common ancestor within the order Carnivora, they have diverged into separate families: bears belong to the family Ursidae, and dogs belong to the family Canidae.
Step 5: Conclude that the correct answer is: Bears and dogs share a common ancestor and both belong to the order Carnivora. This reflects their evolutionary relationship based on shared ancestry and taxonomic classification.
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