Examkin

Question

Difficulty: HardEvidence for Evolution: Paleontology and Fossil Records

Match each paleontological discovery or fossilization phenomenon listed under Fossil Evidence with its corresponding evolutionary significance or geological application listed under Significance.

  • Seymouria fossil recordsRepresents a critical transitional form displaying anatomical features intermediate between amphibians and early reptiles
  • Permineralization processInvolves precipitation of mineral ions into porous organic cavities, preserving cellular microstructure
  • Stromatolite formationsProvides fossilized sedimentary evidence of ancient microbial mats representing early Precambrian cellular life
  • Potassium-argon (40K/40Ar^{40}\text{K}/^{40}\text{Ar}) decay systemServes as an absolute dating method for igneous rock strata enclosing ancient hominid and early vertebrate fossils

Answer

Seymouria fossil records match with 'Represents a critical transitional form displaying anatomical features intermediate between amphibians and early reptiles'; Permineralization process matches with 'Involves precipitation of mineral ions into porous organic cavities, preserving cellular microstructure'; Stromatolites match with 'Provides fossilized sedimentary evidence of ancient microbial mats representing early Precambrian cellular life'; Potassium-argon decay system matches with 'Serves as an absolute dating method for igneous rock strata enclosing ancient hominid and early vertebrate fossils'.
Each item accurately connects a specific paleontological phenomenon with its core evolutionary or geological application. Seymouria represents the amphibian-reptile transition; permineralization describes mineral deposition into cellular spaces; stromatolites demonstrate early Precambrian life; and potassium-argon dating provides absolute ages for ancient volcanic rock strata.

Step-by-Step Solution

1
Analyze transitional fossil specimens
Identify Seymouria as a classic transitional fossil bridging amphibians and reptiles.
Transitional forms provide physical evidence of macroevolutionary species divergence.
2
Examine fossil preservation mechanisms
Connect permineralization to the influx of mineralized water filling cell spaces without replacing the cell wall material entirely.
Different preservation modes tell us about environmental conditions at the time of fossilization.
3
Identify Precambrian fossil evidence
Link stromatolites to cyanobacterial microbial mat formations in ancient marine strata.
Stromatolites establish the baseline geological timeline for early cellular life on Earth.
4
Differentiate radiometric dating techniques
Match potassium-argon (40K/40Ar^{40}\text{K}/^{40}\text{Ar}) dating to volcanic/igneous rock layer dating over long geological timescales.
Because carbon-14 has a short half-life (57305{}730 years), potassium-argon (half-life ≈1.25×109\approx 1.25 \times 10^9 years) must be used for older fossil-bearing volcanic strata.

Key Concept

Paleontological Evidence for Evolution
Rate this question

Topics

Evidence for Evolution: Paleontology and Fossil Records

More questions from this topic