History of Evolution

Front

What is evolution?

Back

A change in the gene pool of a population over time

Answer explanation

Evolution is defined as a change in the gene pool of a population over time, not of individuals or during their lifetime. This process involves genetic variations that occur across generations within a population.

Front

Lamarck proposed which of the following theories?

Back

A single organism can acquire traits over its lifetime that are then passed to its offspring

Answer explanation

Lamarck proposed that organisms can acquire traits during their lifetime, which can then be inherited by their offspring. This idea contrasts with the notion that species do not change or that traits are not passed on.

Front

Charles Darwin was the only scientist to contribute to the theory of evolution.

Back

False

Answer explanation

The statement is false because many scientists, including Alfred Russel Wallace, also contributed to the theory of evolution. Darwin is well-known for his work, but he was not the only contributor.

Front

This image best illustrates:
- Darwin’s theory of evolution
- Lamarck’s theory of evolution
- Malthus’ Principles
- Hutton’s Principles

Back

Lamarck’s theory of evolution

Answer explanation

This image illustrates Lamarck's theory of evolution, which emphasizes the idea that organisms can pass on traits acquired during their lifetime to their offspring, contrasting with Darwin's natural selection.

Front

Who believed that organisms used or disused traits throughout their lifetime, which led Darwin to believe that populations gain traits through natural selection?

Back

Lamarck

Answer explanation

Lamarck proposed that organisms could acquire traits through use or disuse during their lifetime, a concept that influenced Darwin's understanding of natural selection, where traits beneficial for survival are passed on.

Front

This is a process by which organisms inherit advantageous traits that tend to reproduce more successfully than other organisms do.

Back

Natural selection

Answer explanation

Natural selection is the process where organisms with advantageous traits are more likely to survive and reproduce, leading to the inheritance of those traits. This distinguishes it from artificial selection, which is human-directed.

Front

These are natural differences within a species.

Back

Genetic variation

Answer explanation

Genetic variation refers to the natural differences within a species, arising from mutations, gene flow, and sexual reproduction. This variation is crucial for evolution and adaptation, making it the correct choice.

Front

What animals did Charles Darwin study?

Back

Finches.

Answer explanation

Charles Darwin is best known for his study of finches in the Galápagos Islands. These finches played a crucial role in his theory of natural selection, demonstrating how species adapt to their environments.

Front

Do giraffes evolve by stretching their necks to reach higher leaves?

Back

False

Answer explanation

The statement is false because giraffes did not evolve by stretching their necks. Instead, natural selection favored individuals with longer necks, allowing them to reach higher leaves, leading to the evolution of longer necks over generations.

Front

Who believed that organisms develop traits needed for survival and that traits that were unused would become weaker and gradually disappear?

Back

Lamarck

Answer explanation

Lamarck proposed that organisms acquire traits during their lifetime based on their needs, and unused traits weaken and disappear over generations. This idea contrasts with Darwin's theory of natural selection.