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Course: Science — Third Preparatory
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Science — Third Preparatory

Science — Third Preparatory

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Science — Third Preparatory 2026/2027

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Unit 1 - Force, Motion, Acceleration and Physical Quantities

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Text lesson

Unit 3 — Variation of Traits in Living Organisms

Science — Third Preparatory

Unit 3 — Variation of Traits in Living Organisms

2.8 Summary of Lesson 2

2.8 Summary of Lesson 2

Comparison aspectMain ideaKeywords
•A population is a group of the same species in the same place and timepopulationgroupsamespecies
Growth
  • lag
  • exponential
  • slowing
  • stationary at carrying capacity
  • limited by environmental resistance
exponentialslowingstationarycarrying
Factorsenvironmental and geneticenvironmentalgenetic
Natural selection
  • the environment selects the favourable inherited traits
  • slow and cumulative
environmentselectsfavourableinherited
Artificial selection
  • humans choose the traits
  • faster
  • may lower genetic diversity
humanschoosetraitsfaster
•Traditional and modern techniques preserve desirable traitsTraditionalmoderntechniquespreserve
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