Origin Of Species Flashcards
What does NASA define as a system that shows Darwinian evolution?
Any system that shows Darwinian evolution.
What does MRSGREN stand for?
- Movement
- Respiration
- Sensitivity
- Growth
- Reproduction
- Excretion
- Nutrition
What is the earliest evidence of life on Earth?
3.8 billion years ago.
What is LUCA?
Last Universal Common Ancestor.
What was likely the first type of life to utilize RNA?
Earliest life probably used RNA as enzymes.
What role did alkaline hydrothermal vents play in the origin of life?
They may have provided energy to fuel the first replicating molecules.
What is a protobiont?
Lipid structures that can reproduce and metabolize.
True or False: Eukaryotes are far outnumbered by prokaryotes.
True.
What key event allowed for the emergence of eukaryotic life?
Eukaryogenesis, which likely involved an archaebacterium engulfing a heterotrophic eubacterium.
What are some features unique to eukaryotes?
- Nucleus
- Mitochondria
- Chloroplasts
- Golgi bodies
- Meiosis
What significant event occurred during the Cambrian Explosion?
Most of the major types of animals we see today first appeared.
What geological time frame did the Cambrian Explosion occur?
540-515 million years ago.
What are some potential causes of the Cambrian Explosion?
- Physiological changes
- Geographical changes
- Geochemical changes
- Biological changes
Fill in the blank: The first prokaryotes were __________.
methane-producing bacteria.
What is the significance of the Great Oxidation Event?
It marks the increase of oxygen levels in Earth’s atmosphere due to cyanobacteria.
What is the age of the Universe?
14 billion years old.
What is the age of Earth?
4.5 billion years old.
What is the probability of eukaryogenesis considered to be?
It is thought to have happened only once in 3.6 billion years.
