Unit 5: Evolution CFA Practice

Front

What is evolution?

Back

Evolution is the process through which species change over time through variations in traits, driven by natural selection, mutation, and genetic drift.

Front

What is natural selection?

Back

Natural selection is the mechanism by which individuals with favorable traits are more likely to survive and reproduce, leading to the gradual evolution of species.

Front

Define common ancestry.

Back

Common ancestry refers to the concept that different species share a common ancestor from which they have evolved.

Front

What is a mutation?

Back

A mutation is a change in the DNA sequence that can lead to variations in traits among individuals in a population.

Front

Explain the significance of genetic variation in a population.

Back

Genetic variation is crucial for a population's ability to adapt to changing environments and is a key factor in evolution.

Front

What is the role of environmental changes in evolution?

Back

Environmental changes can alter the survival and reproduction of organisms, leading to shifts in traits within a population.

Front

What does the term 'adaptation' mean in the context of evolution?

Back

Adaptation refers to the process by which a species becomes better suited to its environment through evolutionary changes.

Front

How do fossils provide evidence for evolution?

Back

Fossils show the physical characteristics of organisms that lived in the past, demonstrating changes over time and supporting the theory of evolution.

Front

What is the significance of DNA sequencing in understanding evolution?

Back

DNA sequencing allows scientists to compare genetic material between species, revealing similarities and differences that indicate evolutionary relationships.

Front

Define speciation.

Back

Speciation is the process by which new species arise from existing species, often due to genetic divergence and reproductive isolation.