How does the order of fossil layers help in understanding evolution?
Answer and explanation
Correct answer: Older lower layers and newer upper layers show a time sequence
In an undisturbed sequence of sedimentary rock, lower layers were generally deposited earlier than layers above them. Fossils found in successive layers therefore provide evidence about organisms living at different relative times. Comparing their structures can reveal a sequence of biological changes and support evolutionary explanations. Option A is correct; B reverses the usual order, while C and D ignore the historical information preserved by fossils.
Frequently asked questions
What is the correct answer to this question?
Older lower layers and newer upper layers show a time sequence
Why is this the correct answer?
In an undisturbed sequence of sedimentary rock, lower layers were generally deposited earlier than layers above them. Fossils found in successive layers therefore provide evidence about organisms living at different relative times. Comparing their structures can reveal a sequence of biological changes and support evolutionary explanations. Option A is correct; B reverses the usual order, while C and D ignore the historical information preserved by fossils.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: World of Living. Topic: Heredity and Evolution.
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