How Evolution Works

What is evolution?

• The process of individual organisms changing over their lifetime.

• The development of life on Earth, continuing to this day.

• The sudden appearance of new species.

• The process by which animals become extinct.

Which statement best defines a species?

• A group of animals that look exactly alike.

• A community of animals that can produce offspring, and those offspring can also reproduce.

• Any group of living organisms found in the same habitat.

• Animals that share a common ancestor.

What is the correct order of genetic information from largest to smallest?

• Genes, DNA, Chromosomes, Nucleus, Cells

• Cells, Nucleus, Chromosomes, DNA, Genes

• Nucleus, Cells, DNA, Chromosomes, Genes

• Chromosomes, Genes, DNA, Cells, Nucleus

What is recombination in the context of heredity?

• Random changes in DNA caused by external factors.

• The process where an organism produces more offspring than the environment can support.

• The random mixing of DNA from two parents to create unique offspring.

• The passing of traits from parents to offspring without any changes.

What two processes change DNA, leading to offspring with a random mix of parental characteristics?

• Adaptation and natural selection

• Recombination and mutation

• Speciation and competition

• Heredity and environment

What process determines which individuals with a unique mix of traits are best suited to survive and pass on their characteristics in a given environment?

• Genetic drift

• Mutation

• Natural selection

• Recombination

Why is diversity imporant in evolution?

• It leads to extinction

• It increases the likelihood of survival

• It has no impact on survival

• It limits the number of species

What was the primary reason the finches on the Galapagos Islands eventually evolved into different species?

• They were blown onto the islands by a big storm.

• They developed different beak shapes to exploit different food sources.

• They reproduced rapidly and numerously.

• They had no predators on the islands.

Which combination of factors is essential for the creation of new species through evolution?

• Unique individuals, excess offspring, recombination/mutation, and selection.

• Abundant food, lack of predators, and stable climate.

• Large population size, genetic drift, and geographic isolation.

• Environmental toxins, parasites, and interspecies competition.

How does the video conclude regarding human evolution?

• Humans are unrelated to any other species

• Humans are the result of 3.5 billion years of evolution

• Humans have always existed

• Humans are the only species left on Earth