Which one is correct?

Options

A. Most fossils are found in sedimentary rocks
B. According to Lamarck, a giraffe has a long back because its ancestors stretched their necks to get food
C. The unit of evolution is population
D. All of the above

Answer

To determine which statement is correct, we will analyze the provided options step by step.

**Step 1: Analyze Option 1**
- The statement claims that most fossils are found in sedimentary rocks.
- This is a widely accepted fact in geology and paleontology. Fossils are typically formed in sedimentary environments where organisms are buried by sediments, allowing for fossilization over time.

**Conclusion for Step 1:**
- Option 1 is correct.

**Step 2: Analyze Option 2**
- The statement refers to Lamarck's theory, which suggests that a giraffe has a long neck because its ancestors stretched their necks to reach food in taller trees.
- This idea is part of Lamarckism, which posits that traits acquired during an organism's lifetime can be passed on to its offspring. However, this theory has been largely discredited in favor of Darwinian evolution, which emphasizes natural selection rather than the inheritance of acquired characteristics.

**Conclusion for Step 2:**
- While the statement reflects Lamarck's theory, it is not considered correct in the context of modern evolutionary biology.

**Final Conclusion:**
- The correct option is Option 1: "Most fossils are found in sedimentary rocks."

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