1-EVOLVING-CONCEPT-OF-LIFE

Module Overview

  • Module Title: Evolving Concept of Life Based on Emerging Pieces of Evidence

Quiz Directions

  • Directions involve selecting the best answer and writing it on a separate sheet.

Key Questions and Concepts

Page 2

  1. Dinosaurs Evolution

    • Era: Mesozoic Era

    • Other options: Cenozoic, Paleozoic, Proterozoic.

  2. First Photosynthetic Organisms

    • Organism: Cyanobacteria

    • Other options: Bryophyllum, Stromatolites, Zircon crystal.

Page 3

  1. Oxygen Revolution Adaptations

    • Adaptation: Evolution of cellular respiration that utilized oxygen from organic molecules.

    • Other options focused on early protists engulfing cyanobacteria, evolution of multicellularity, and protective pigments against oxygen.

Page 4

  1. Life Appearance Timing

    • Reason: The planet had cooled down enough to sustain life.

  2. First Organisms Developed

    • Type: Prokaryotic and anaerobic organisms.

Page 5

  1. Fossils

    • Definition: Remains of living organisms that help understand Earth's life history.

  2. Fossil Truths

    • Incorrect Statement: Most extinct organisms have been preserved (True: Only a small percentage is preserved).

  3. Definition of Fossil

    • Example: A billion-year-old amber with a primitive insect inside.

Page 6

  1. Research Focus in Eukaryotes

    • Substance: Biomarkers

  2. Evidence of Common Ancestor

  • Evidence: Shared underlying molecular biology among all life forms.

Page 7

  1. Importance of Studying Past

  • Significance: Understanding past allows prediction of the future.

  1. Surviving Species of Genus Homo

  • Species: Human beings

Page 8

  1. Pandemics Historical Significance

  • Significance: Provides insights for future medical treatments.

  1. Research Challenges

  • Non-challenge: Availability of materials and laboratories (this is true).

Page 9

  1. Significance of Stromatolites

  • Definition: Layered structures produced by bacteria and sediment.

Activities

Page 10

  • Activity 1: Create a personal timeline to reflect significant life events.

Page 11

  • Activity 2: Arrange life forms' appearance timelines.

Page 13

  • Activity 5: Name important pieces of evidence about life evolution.

Timeline of Earth’s History

Page 11 Highlights

  • 4.6 - 3.8 BYA: Early Earth's violent conditions, formation of zircon crystals.

  • 3.5 BYA: First evidence of life with prokaryotes in stromatolites.

  • 3.0 BYA: Emergence of cyanobacteria.

  • 2.0 BYA: Appearance of first eukaryotes.

  • 1.2 BYA: Development of multicellular organisms.

  • 500 MYA: Dominance of trilobites and cephalopods in the Paleozoic Era.

  • 251 - 65.5 MYA: Mesozoic Era dominated by reptiles.

  • 250 TYA: Evidence of Homo erectus.

Research Challenges

Pages 16-18

  • Challenges in Evidence Search: Microscopic size of cells, tectonic activity destroying ancient rocks, and filament discoveries related to ancient life.

Page 19-22

  • Evolution Overview: Transition from simple to complex life forms linked to environmental changes.

Pages 24-27

  • Activity 6-12: Various activities reflecting on the significance of life history and interactions with the environment.

Page 28-37

  • Final Questions: Assess the understanding of evolution, significance of historical studies, and the impact of human activities on ecosystems.