GCSE Biology - Variation and Evolution #68

The video explains how genetic and environmental factors lead to variation among individuals, influencing evolution through natural selection. It covers phenotypes, genomes, and the role of mutations in genetic variation. Charles Darwin's theory of evolution by natural selection is discussed, highlighting the survival of the fittest concept. Evidence supporting evolution, such as antibiotic resistance and fossil records, is also presented.

What term is used to describe the observable characteristics of an individual resulting from the interaction of genes and the environment?

• Genotype

• Phenotype

• Allele

• Chromosome

What is the primary cause of genetic variation among individuals?

• Environmental changes

• Mutations

• Dietary habits

• Physical exercise

Which of the following is a potential outcome of a beneficial mutation?

• Improved resistance to lung disease

• Decreased ability to reproduce

• Increased susceptibility to diseases

• Reduced lifespan

Who is credited with the concept of 'survival of the fittest'?

• Jean-Baptiste Lamarck

• Charles Darwin

• Alfred Wallace

• Gregor Mendel

What is the process called where the fittest individuals are selected to survive and reproduce?

• Artificial selection

• Natural selection

• Gene flow

• Genetic drift

According to Darwin's theory, what can the inheritance of certain traits over generations lead to?

• Uniformity among species

• Extinction of all species

• Development of new species

• Stagnation of species

What evidence supports the theory of evolution by natural selection?

• Antibiotic resistance in bacteria

• The existence of identical twins

• The construction of pyramids

• The variety of human languages