Key Idea.
Section 1
The Environment is the Judge
No trait is automatically "good" or "bad." A trait's value depends entirely on the environment.
For example, white fur is an adaptive trait for a bear in the Arctic because it provides camouflage. However, that same white fur would be a disadvantage (non-adaptive) in a dark forest. The environment determines which traits are useful.
Section 2
Environmental Pressures
Environments are difficult places to live. Organisms face environmental pressures, such as predators, lack of food, or harsh weather.
These pressures create a struggle for survival. Because of variation, not all individuals struggle equally. Those with adaptive traits (like higher poison) are better equipped to handle the pressure than those without them.
Expand to review the lesson summary and core properties.
Section 1
The Environment is the Judge
No trait is automatically "good" or "bad." A trait's value depends entirely on the environment.
For example, white fur is an adaptive trait for a bear in the Arctic because it provides camouflage. However, that same white fur would be a disadvantage (non-adaptive) in a dark forest. The environment determines which traits are useful.
Section 2
Environmental Pressures
Environments are difficult places to live. Organisms face environmental pressures, such as predators, lack of food, or harsh weather.
These pressures create a struggle for survival. Because of variation, not all individuals struggle equally. Those with adaptive traits (like higher poison) are better equipped to handle the pressure than those without them.