Multiple Choice
Which evolutionary process is most likely to occur when populations of the same species become geographically isolated from each other?
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21. Evolution
Introduction to Evolution and Natural Selection
Multiple Choice
An ancestral species and all its evolutionary descendants define a(n) ________.
A
clade
B
gene pool
C
population
D
ecosystem
Verified step by step guidance1
Understand the key terms in the question: 'ancestral species' refers to a common ancestor, and 'evolutionary descendants' are all the species that have evolved from that ancestor.
Recall the definition of a clade: A clade is a group of organisms that includes an ancestral species and all of its descendants, forming a single branch on the tree of life.
Differentiate the other options: A 'gene pool' refers to the total genetic diversity within a population, a 'population' is a group of individuals of the same species living in a specific area, and an 'ecosystem' includes all living organisms and their physical environment in a particular area.
Match the definition of a clade to the description in the question: The question specifically asks for a term that includes both an ancestral species and all its evolutionary descendants, which aligns with the definition of a clade.
Conclude that the correct answer is 'clade' based on the alignment of the definition with the question's description.
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