Basics
Mechanisms
Evidence of Natural Selection
Adaptation in Action
Natural Selection & Antibiotics
100

The theory that organisms with traits suited to their environment survive and reproduce more successfully.

What is Natural Selection?

100

When more offspring are produced than can survive, leading to competition for resources.

Overproduction
100

The type of adaptation shown by deer mice in the Sand Hills with light-colored fur.

Camouflage

100

This term describes a plant’s ability to produce seeds and survive through droughts.

Early Flowering

100

The medical treatment that has led to antibiotic-resistant bacteria

Antibiotics

200

The scientist who proposed the theory of natural selection in the 1850s.

Darwin

200

The competition for food, water, and space due to limited resources.

Competition

200

This environmental factor led to early-flowering field mustard plants in California.

Drought

200

The survival of bacteria resistant to antibiotics is an example of this process.

Natural Selection

200

The result of not completing a full course of antibiotics.

Increased Antibiotic Resistance

300

The process by which traits change over generations due to environmental changes.

Adapatation

300

The result of advantageous traits being passed on to future generations.

Survival and Reproduction

300

The genetic change that allowed deer mice in the Sand Hills to avoid predators.

Mutation

300

When bacteria survive antibiotic treatments due to inherited resistance.

Antibiotic Resistance

300

This happens when resistant bacteria survive and multiply.

Natural Selection

400

The differences among individuals within the same species.

Genetic Variation

400

The term for traits that increase an organism’s chance of survival in its environment.

Adaptations

400

The adaptation process that led to early-flowering field mustard over generations

Natural Selection

400

An adaptation that helps organisms blend into their environment

Camouflage

400

Why bacteria in people who rarely use antibiotics don’t develop resistance.

Resistance gives no advantage
500

The mechanism driving the changes in traits within a population over time.

Natural Selection

500

When a species changes over time to better survive in its environment, it undergoes this.

Evolution

500

The reason why light-colored deer mice survive better in the Sand Hills.

They blend in

500

The change in deer mice fur color in response to soil color is an example of this.

Adaptation

500

The more often antibiotics are taken, the more chances bacteria have to do this.

Develop Resistance