Natural Selection

Darwin hypothesized that species in the wild evolve through a process called

Darwin observed that tortoises living on islands within 50 miles of one another were ______________ each other.

Darwin was fascinated by the diversity of _______ size and shape in Galapagos finches.

The variation between a cocker spaniel and a Great Dane is the result of ________.

Beneficial traits that are ____________ by parents can be passed on to offspring.

One of the reasons species evolve is that animals often produce ________ offspring than an environment can support.

Geographic isolation _______ contribute to evolution.

Traits that increase an organism's chance of survival are called _____________.

What are the four requirements (steps) that explain Darwin's theory of evolution by natural selection?

the process of intentionally breeding a plant or animal for specific characteristics