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Foundations of Evolutionary Theory
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1
Question
What was the dominant view of nature before Darwin?
Answer
Intractable truths held by deep-seated beliefs, not experimentation
2
Question
How does evolution explain the unity and diversity of life?
Answer
Recent common ancestry causes similarities; ancient ancestry causes differences
3
Question
What system did Linnaeus develop for classifying living things?
Answer
Binomial nomenclature system
4
Question
What was Buffon's contribution to evolutionary thought?
Answer
Evidence of descent with modification and mechanisms like environmental influences
5
Question
Which catastrophist idea was proposed by Cuvier?
Answer
Local catastrophes caused new fossil assemblages and species extinction
6
Question
What was Lamarck's key idea about evolution?
Answer
Linkage of diversity to environmental adaptation and inheritance of acquired traits
7
Question
How did Malthus influence Darwin's theory?
Answer
His ideas on population growth and resource limitations informed natural selection
8
Question
What does uniformitarianism, proposed by Lyell, state about Earth's change?
Answer
Erosion and uplift occur at constant rates over time
9
Question
In Lamarck's hypothesis, how do giraffes acquire long necks?
Answer
By stretching their necks to reach food, inherited through Lamarckian mechanisms
10
Question
How does Darwin's natural selection differ from Lamarck's inheritance of acquired characteristics?
Answer
Natural selection favors traits due to survival advantage; Lamarck's involves traits acquired during life
11
Question
What geographic evidence supports evolution?
Answer
Related species in similar habitats suggest recent common ancestors; distributions reflect past connections
12
Question
What are homologous structures and their significance?
Answer
Anatomically similar bones from a common ancestor, supporting descent
13
Question
What do vestigial structures indicate about evolution?
Answer
Reduced or obsolete features inherited from ancestors, showing common descent
14
Question
Why are biochemical molecules evidence for evolution?
Answer
Universal molecules and shared sequences suggest recent common ancestry
15
Question
What role do Hox genes play in development?
Answer
Control body plans; variation leads to diverse body structures among animals
16
Question
What misconceptions exist about evolution?
Answer
That it explains life's origins or lacks transitional fossils; these are false
17
Question
What is the purpose of the Tree of Life Project?
Answer
To determine how all life is related and descended from a common ancestor
18
Question
What is a transitional fossil?
Answer
Fossil showing traits of two different groups, indicating common ancestry
19
Question
How does biogeography support evolution?
Answer
Distribution patterns of related species suggest local evolution and spread
20
Question
What are homologous and analogous structures?
Answer
Homologous: same origin, different function; Analogous: same function, different origin
21
Question
What biochemical evidence supports evolution?
Answer
Shared DNA triplets and amino acids indicate common descent
22
Question
How do variations within a population contribute to evolution?
Answer
Random functional, physical, and behavioral differences endure selection, aiding adaptation
23
Question
What is the significance of Hox gene variation?
Answer
It explains the diversity of body structures among animals via gene regulation differences
24
Question
Why is evolution considered a scientific theory?
Answer
It is testable, observable, and supported by extensive evidence, making it a unifying scientific framework