Evolution

Structures with no function that are remnants of an organism’s evolutionary past.

A feature that allows an organism to survive better in its environment.

By altering the chemical composition of their leaves to make them less nutritious and more difficult for caterpillars to digest.

Blue mussels with thick shells survive and reproduce more successfully than mussels without thick shells.

The process where individuals better able to adapt to changes in their environment leave more offspring.

Individuals of species compete with one another to survive.

The variety of genes within a species, which is essential for natural selection.

It refers to the idea that individuals best adapted to their environment are more likely to survive and reproduce.

An anatomical feature in different species that is similar due to shared ancestry.

Adaptation is a trait that improves survival, while variation refers to differences among individuals in a population.