Evolution and Natural Selection Review

What is natural selection?

• Natural selection is the process by which organisms adapt to their environment over time.

• Natural selection is the mechanism by which individuals with favorable traits are more likely to survive and reproduce.

• Natural selection is the theory that all species evolve from a common ancestor.

• Natural selection is the practice of breeding plants and animals for desired traits.

What is adaptation?

• A trait that enhances an organism's ability to survive and reproduce in its environment.

• A process of changing the color of an organism's skin.

• A method of communication among animals.

• A type of food that organisms consume.

What is the significance of homologous structures?

• They are identical structures in different species.

• They indicate a common ancestry among different species.

• They serve the same function in different species but have different origins.

• They are structures that have evolved independently in different species.

Why is genetic variation important for a species?

• It decreases the chances of extinction.

• It increases a population's ability to adapt to changing environments.

• It leads to more genetic diseases.

• It makes reproduction more difficult.

What is a common ancestor?

• A species that has no descendants.

• An early species from which different species have evolved.

• A species that is currently living.

• A species that has gone extinct without any descendants.

What is variation in the context of evolution?

• Variation refers to the differences in traits among individuals in a population.

• Variation is the process by which species become extinct.

• Variation is the mechanism by which organisms adapt to their environment.

• Variation is the genetic similarity among individuals in a population.

How does the fossil record support evolution?

• The fossil record shows a chronological sequence of life forms, illustrating gradual changes over time.

• The fossil record only contains the remains of dinosaurs and does not show other life forms.

• The fossil record is incomplete and does not provide any evidence for evolution.

• The fossil record shows that all species appeared suddenly without any changes.

What role do environmental changes play in evolution?

• They have no impact on evolution.

• They can create new challenges that drive natural selection and lead to evolution.

• They only affect the physical characteristics of organisms.

• They slow down the process of evolution.

What is evolution?

• Evolution is the process through which species change over time through variations and natural selection.

• Evolution is the study of ancient fossils and their habitats.

• Evolution is the method by which organisms are created from non-living matter.

• Evolution is the process of species becoming extinct due to environmental changes.

What is the role of competition in natural selection?

• Competition leads to the extinction of all species.

• Competition for resources can lead to the survival of the fittest, where only the best-adapted individuals thrive.

• Competition has no effect on natural selection.

• Competition only affects the population size, not the adaptation of species.