- The role of genetic recombination in variation.
- The non-heritability of somatic cell changes.
- The concept of common descent.
- The mechanism of natural selection.
Category: EVOLUTION
- Organisms constantly strive for perfection.
- Traits acquired during an organism's lifetime can be inherited by offspring.
- Environmental changes drive evolutionary adaptations.
- Natural selection acts on existing variations within a population.
- Random mutations providing a survival advantage.
- Individuals stretching their necks to reach high leaves, and this trait being passed on.
- Differential survival of giraffes with naturally longer necks.
- Genetic drift leading to neck elongation over generations.
- Complex life forms emerged directly from inorganic matter.
- Simple organic molecules first formed, then self-assembled into more complex structures that eventually gained biological properties.
- Living organisms were transported to Earth from outer space.
- All life originated from a single, highly advanced protocell.
- Inherit a predisposition for stronger muscles.
- Be born with inherently stronger muscles.
- Develop stronger muscles only if they also exercise.
- Show no inherited changes in muscle mass due to parental exercise.
- Perform complex photosynthesis.
- Maintain an internal environment distinct from their surroundings.
- Replicate their genetic material independently.
- Develop rigid cell walls for protection.
- Organic molecules would have formed more rapidly.
- Complex polymers would have easily self-assembled.
- The formation of organic molecules would have been inhibited or reversed.
- Protocells would have developed complex metabolic pathways.
- Continuous heating of water in the flask.
- Presence of a condenser for cooling.
- Electrical discharges through the gaseous mixture.
- Collection of condensed liquid in a trap.
- Geothermal heat from volcanic activity.
- Chemical energy from deep-sea vents.
- Ultraviolet radiation and lightning.
- Photosynthesis by early autotrophs.
- Simple sugars and complex lipids.
- Nucleotides and nucleic acids.
- Amino acids and other simple organic molecules.
- Proteins and functional enzymes.
- Oxidizing nature with abundant free oxygen.
- Reducing nature with absence of free oxygen.
- Neutral composition with balanced gases.
- High concentration of ozone and nitrogen.
