- A Fossils consistently show very little detectable change in body form or structure across most known geological time periods studied in general practice as frequently described
- B Fossils show a progression of life forms from simple (older) to complex (newer), with transitional forms linking major groups (e.g., Archaeopteryx linking reptiles to birds)
- C Most fossils discovered to date come mainly from extremely recent geological time periods within the last few centuries in most textbook accounts during normal conditions
- D Fossils preserved in sedimentary rock layers are found to mostly contain remains of marine aquatic organisms as generally observed in typical laboratory settings under usual circumstances
Correct answer: B. Fossils show a progression of life forms from simple (older) to complex (newer), with transitional forms linking major groups (e.g., Archaeopteryx linking reptiles to birds)
Explanation: Fossil record provides direct evidence of past life and its change over time. Key evidence: (1) Age of fossils increases with depth in rock strata; (2) Simple organisms in older rocks, complex in newer; (3) Transitional fossils (Archaeopteryx - reptile-bird, Tiktaalik - fish-tetrapod); (4) Clear lineages showing gradual change (horse evolution, whale evolution).
Concept context
Origin of life, Darwin's theory, natural selection, speciation, and evidence for evolution.