Question

select the correct answer.

why does it become difficult to read old fossils?

older fossils are difficult to obtain because theyre extremely deep in the earths crust.
older fossils are biologically less important than newer ones.
older fossils provide less information about evolution.
older fossils are only formed by sedimentation.

Explanation:

Analyze the question

The question asks why it becomes difficult to "read" old fossils. In paleontology, "reading" a fossil refers to extracting clear biological and evolutionary information from it.

Evaluate the first option

The first option states: "Older fossils are difficult to obtain because they're extremely deep in the Earth's crust." While older rock layers are generally deeper (law of superposition), this explains why they are difficult to find or excavate, not why they are difficult to read (interpret) once they are obtained.

Evaluate the second option

The second option states: "Older fossils are biologically less important than newer ones." This is scientifically incorrect. Older fossils are highly important because they document the earliest stages of life and major evolutionary transitions.

Evaluate the third option

The third option states: "Older fossils provide less information about evolution." Over time, geological processes such as heat, pressure, tectonic activity, and erosion degrade fossil quality. Consequently, older fossils are often incomplete, distorted, or poorly preserved, making them much harder to "read" and extract detailed evolutionary data from compared to younger, well-preserved fossils.

Evaluate the fourth option

The fourth option states: "Older fossils are only formed by sedimentation." This does not explain why they are difficult to read, and sedimentation is actually the primary way most fossils of any age are preserved.

Answer:

• Older fossils are difficult to obtain because they're extremely deep in the Earth's crust.
• Older fossils are biologically less important than newer ones.
• Older fossils provide less information about evolution. (Correct answer)
• Older fossils are only formed by sedimentation.