Multiple Choice
Which of the following characteristics is unique to a synthesis reaction in organic chemistry?
3. Acids and Bases
Organic Chemistry Reactions
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Which of the following statements best describes the appearance of fossils in sediment layers if species have evolved over time?
A
Fossils should appear randomly distributed throughout the layers.
B
Fossils should show a gradual change in complexity from older to newer layers.
C
Fossils should only be found in the oldest layers, with no fossils in newer layers.
D
Fossils should be identical in all layers, indicating no change over time.
Verified step by step guidance1
Understand the concept of fossil record: Fossils are the preserved remains or traces of organisms from the past, found in sedimentary rock layers. They provide evidence of how life has evolved over time.
Recognize the principle of superposition: In sedimentary rock layers, the oldest layers are at the bottom and the youngest are at the top. This helps in understanding the chronological order of fossil appearance.
Consider the theory of evolution: According to evolutionary theory, species change over time through natural selection and adaptation, leading to increased complexity and diversity in newer species compared to older ones.
Analyze the fossil distribution: If species have evolved over time, fossils should not be randomly distributed. Instead, they should show a progression from simpler to more complex forms as you move from older to newer layers.
Evaluate the given statements: The statement that best describes the appearance of fossils in sediment layers, if species have evolved over time, is that fossils should show a gradual change in complexity from older to newer layers.
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