Biology STAAR Review

Front

What is a producer in an energy pyramid?

Back

Producers are organisms that create their own food through photosynthesis, such as plants. They have the most available energy in an energy pyramid.

Front

What role do decomposers play in the nitrogen cycle?

Back

Decomposers break down dead organic matter and return nitrogen to the soil, which is then transformed into nitrogen gas by bacteria.

Front

How much energy from maize is available to a lizard?

Back

1% of the initial energy from maize is available to the lizard.

Front

What is a chromosomal deletion mutation?

Back

A chromosomal deletion mutation occurs when a segment of DNA is removed or lost, which can lead to genetic disorders.

Front

How does the nervous system interact with the endocrine system?

Back

The nervous system sends signals to the adrenal glands to release hormones like adrenaline into the bloodstream.

Front

What is the primary function of bacteria in the nitrogen cycle?

Back

Bacteria convert nitrogen in the soil into nitrogen gas, completing the nitrogen cycle.

Front

Define energy pyramid.

Back

An energy pyramid is a graphical representation of the energy flow in an ecosystem, showing the energy available at each trophic level.

Front

What is the significance of producers in an ecosystem?

Back

Producers are essential as they form the base of the food chain, providing energy for all other organisms.

Front

What is a consumer in an energy pyramid?

Back

Consumers are organisms that cannot produce their own food and rely on consuming other organisms for energy.

Front

What is the difference between a scavenger and a decomposer?

Back

Scavengers consume dead animals, while decomposers break down organic matter into simpler substances.