U3T2 Review

Front

What is active transport?

Back

Active transport is the movement of ions or molecules across a cell membrane from a region of lower concentration to a region of higher concentration, using energy (ATP).

Front

Give an example of active transport.

Back

Sodium ions moving out of a cell against a concentration gradient is an example of active transport.

Front

What are the reactants in photosynthesis?

Back

The reactants in photosynthesis are carbon dioxide (CO2), water (H2O), and light energy.

Front

Where does photosynthesis occur in plants?

Back

Photosynthesis occurs in the chloroplasts of plant cells.

Front

What is the role of producers in an ecosystem?

Back

Producers convert light energy into chemical energy through photosynthesis, forming the base of the food chain.

Front

What is the process of converting light energy into chemical energy called?

Back

Photosynthesis.

Front

What is the role of bacteria in ecosystems?

Back

Bacteria play a crucial role in breaking down dead organic matter, recycling nutrients back into the ecosystem.

Front

What is competition in an ecosystem?

Back

Competition occurs when two or more organisms vie for the same resources, such as food, water, or space.

Front

What is a food web?

Back

A food web is a complex network of feeding relationships among organisms in an ecosystem.

Front

What is the difference between autotrophs and heterotrophs?

Back

Autotrophs produce their own food (e.g., plants), while heterotrophs consume other organisms for energy (e.g., animals).