AP Biology- Unit 8.1

The bacteria are responding to their biological clocks.

The bacteria are communicating to coordinate their movement.

The bacteria are exhibiting taxis.

The bacteria are exhibiting kinesis.

Short-day plants flower when there is a long photoperiod.

Plants experiencing phototropism move toward sunlight.

Navigating birds lack an internal compass, so they rely on stars.

A circadian clock operates during daylight hours.

Brightly colored flowers communicate a source of nectar to pollinators.

Rattlesnakes use auditory communication when threatened.

Animals mark their territories using chemical communication.

Plants are unable to use chemical communication.

Innate behaviors are performed better over time.

Imprinting on a parent is an example of an innate behavior.

Imitation is an example of a learned behavior.

Courtship displays in birds are commonly learned behaviors.

The fitness costs of social living outweigh the fitness benefits.

Benefits include the ability of predators to capture and subdue large prey.

Costs include having to share food with other members of the same species.

Some species are highly social, living in groups that number in the thousands.