Biology Review 2

Front

What is the correct order of levels of organization in a complex organism?

Back

organelles → cells → tissues → organs → organ systems

Front

What is the primary function of gas exchange structures in organisms?

Back

Gas exchange is the process of taking in oxygen and expelling carbon dioxide.

Front

What type of organism is typically found at the producer level in an ecosystem?

Back

Producers are usually plants or photosynthetic organisms that create their own food.

Front

In an experiment, what is the independent variable?

Back

The independent variable is the factor that is changed or manipulated in an experiment, such as exercise in the clothespin investigation.

Front

What human activity can help reduce the size and number of dead zones in aquatic environments?

Back

Reducing the use of chemicals on farm fields and golf courses can help decrease dead zones.

Front

Define 'ecosystem'.

Back

An ecosystem is a community of living organisms interacting with their physical environment.

Front

What are decomposers and their role in an ecosystem?

Back

Decomposers break down dead organic material, recycling nutrients back into the ecosystem.

Front

What is photosynthesis?

Back

Photosynthesis is the process by which green plants and some other organisms use sunlight to synthesize foods with the help of chlorophyll.

Front

What is the function of nerve cells?

Back

Nerve cells, or neurons, transmit electrical signals throughout the body, facilitating communication between different body parts.

Front

What is an algae bloom and its impact on aquatic life?

Back

An algae bloom is a rapid increase in algae in water bodies, often leading to oxygen depletion and harming aquatic life.