The Diversity of Life Flashcards
Name the 8 Characteristics of life:
- Cellular organisation
- Reproduction
- Metabolism
- Homeostasis
- Heredity
- Response to stimuli
- Growth and development
- Adaptation through evolution
When is theorised to be the earliest cells evolved on earth?
3.4 billion years ago
What is a micrometre in metres?
1e-6 m
How big is a eucaryote (give a range)?
10-100μm
How big is a prokaryote? (less than…)
<5μm
How big is a mitochondria? (give a range)
1-10μm
How big is a chloroplast? (give a range)
2-5 μm
What is a nanometre in micrometres?
1e-3μm
What is a nanometre in metres?
1e-9 m
What is required for evolution to occur?
- replicating organisms
- variation in individuals
- differential survival
What is the mechanism of evolution called?
Natural selection
What is Natural selection?
- mechanism for evolution
- occurs when one trait/allele is more beneficial to an organisms survival due to a selective force, differential survival causes more offspring to survive and reproduce that possess the beneficial trait, than those that dont
What is required for Natural selection?
- variation
- inheritance
- selection/ selective force
- time
What are the three domains of life?
- Bacteria
- Eukarya
- Archaea
What is the endosymbiosis theory?
Two key organelles in the eukaryote ( mitochondria and chloroplast) are derived from bacteria. They were engulfed by the ancestors of eukaryotes and tamed
