Released STAAR Biology EOC · 2025 · Item 3 · 1 point
Walkthrough: Biology 2025, Item 3
B.5B · Cell Complexity · unscored study
Which conclusion is shared by BOTH theories to explain cell complexity?
| Endosymbiotic Theory | Autogenous Theory |
|---|---|
| • Claims some organelles evolved from symbiotic relationships with prokaryotic ancestors • Mainly applies to mitochondria and chloroplasts • Proposed by Margulis in 1967 | • Sees eukaryotes evolving directly from a prokaryote ancestor • Claims eukaryotic cells were created by infoldings of the plasma membrane • Mainly applies to the endoplasmic reticulum, Golgi body, and single membrane-bound organelles • Presented in 1967 by Klein and Cronquist |
- Membrane-bound organelles like the Golgi body are less complex than mitochondria.
- Cells became less complex by joining together with other cells.
- Mitochondria developed before chloroplasts in complex eukaryotic cells.
- Complex eukaryotic cells developed from simpler prokaryotic cells.
1. Understand the question
Read both theories in the table and find the one conclusion they share.
Try the question on your own first, then reveal one step at a time.
2. Solve it step by step
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