Behavioral Biology worksheets

A living thing.

The basic unit of structure and function in living things.

Any change or signal in the environment that can make an organism react in some way.

An action or change in behavior that occurs as a result of a stimulus.

__________ organisms consist of many cells. Humans are __________ organisms with trillions of cells specialized to do certain tasks.

The most common chemical in cells is ___________, which is essential for life.

Means becoming larger

_______________ is change that leads to maturity

All organisms need ________ to power their cells.

Some organisms, called __________, can get energy from sunlight in a process known as photosynthesis.

Some organisms, called ___________, get energy by eating other living things.

A group of similar organisms that can mate with each other and produce offspring that can also mate and reproduce.

The process of grouping things based on their similarities.

A taxonomic category that names a group of similar, closely related organisms

The scientific study of how living things are classified.

The most basic level of organization in the classification of organisms.

Change over time; the process by which modern organisms have descended from ancient organisms.

___________ includes the familiar kingdoms of plants, animals, and fungi.

A less familiar kingdom, _____________, has much simpler organisms that contains a group of one-celled organisms without nuclei in their cells.

___________ have only one cell and no nucleus, but have different structures and chemical processes from those of Archaea.

_____________ is the idea that some individuals are better adapted to their environment than others. The better-adapted individuals are more likely to survive and reproduce than other members of the same species.