Biology STAAR 2021

Front

What is species diversity?

Back

Species diversity refers to the variety of different species within a given ecosystem, which contributes to the overall health and resilience of that ecosystem.

Front

What role do grasses play in sand dune ecosystems?

Back

Grasses help stabilize sand dunes, prevent erosion, and create a habitat for other plant and animal species.

Front

What is the primary function of carbohydrates in cells?

Back

Carbohydrates primarily serve as a source of energy for cells.

Front

What is the primary function of lipids in cells?

Back

Lipids serve as long-term energy storage, insulation, and make up cell membranes.

Front

What is a dichotomous key?

Back

A dichotomous key is a tool used to identify organisms based on a series of choices that lead the user to the correct name of a given item.

Front

What is the significance of wings in flightless birds like penguins?

Back

In flightless birds, wings may serve other functions such as swimming or aiding in balance rather than flight.

Front

What is the integumentary system?

Back

The integumentary system includes the skin, hair, nails, and glands, and it protects the body from external damage.

Front

What is the nervous system's role in response to irritants?

Back

The nervous system processes signals from receptors in the skin and coordinates responses such as itching or scratching.

Front

How do adaptations help organisms survive in their habitats?

Back

Adaptations are traits that enhance an organism's ability to survive and reproduce in its environment, such as camouflage or specialized limbs.

Front

What is energy storage in biological systems?

Back

Energy storage refers to the way organisms store energy for later use, primarily in the form of carbohydrates and lipids.