Question 1

What is natural selection and how does it relate to evolution in the IB MYP Science curriculum?

Accepted Answer

Natural selection is a fundamental mechanism of evolution, where organisms better adapted to their environment tend to survive and produce more offspring. In the IB MYP Science curriculum, natural selection is studied as a key process that drives evolutionary change, explaining how species evolve over time through variations that enhance survival and reproduction.

Question 2

How does natural selection lead to the adaptation of species?

Accepted Answer

Natural selection leads to adaptation by favoring traits that improve an organism's chances of survival and reproduction in a particular environment. Over generations, these advantageous traits become more common within the population, resulting in species that are well-suited to their environment. This process of adaptation is a central concept in understanding how species evolve.

Question 3

What are some examples of natural selection in action?

Accepted Answer

Examples of natural selection include the development of antibiotic resistance in bacteria, where only resistant bacteria survive and reproduce, and the evolution of the peppered moth in England, where moths with coloration that matched their environment were less likely to be eaten by predators. These examples illustrate how natural selection can lead to significant changes in populations over time.

Question 4

What role do genetic variations play in natural selection?

Accepted Answer

Genetic variations are crucial for natural selection because they provide the raw material for evolution. Variations arise through mutations, gene shuffling during reproduction, and other genetic processes. Natural selection acts on these variations, favoring those that confer a survival or reproductive advantage, leading to evolutionary change over time.

Question 5

How does natural selection differ from artificial selection?

Accepted Answer

Natural selection is a process driven by environmental pressures where organisms with advantageous traits are more likely to survive and reproduce. In contrast, artificial selection is a human-driven process where individuals with desirable traits are selectively bred to produce offspring with those traits. While both processes lead to changes in populations, natural selection occurs naturally, whereas artificial selection is intentional and guided by human choice.

Natural Selection

Learn this Topic

Short Study Notes in the form of Slides

Study Notes & Exam Tips

Practice questions

Past paper style quiz

Assess your understanding

Natural Selection — frequently asked questions