Biology STAAR Review

Front

What is the basic unit of life?

Back

The cell is the basic unit of life, which can exist as a single cell (unicellular) or as part of a multicellular organism.

Front

What is photosynthesis?

Back

Photosynthesis is the process by which green plants, algae, and some bacteria convert light energy into chemical energy in the form of glucose, using carbon dioxide and water.

Front

What is the function of DNA?

Back

DNA (deoxyribonucleic acid) carries genetic information necessary for the growth, development, functioning, and reproduction of all living organisms.

Front

What is natural selection?

Back

Natural selection is the process by which organisms better adapted to their environment tend to survive and produce more offspring.

Front

What are the three domains of life?

Back

The three domains of life are Archaea, Bacteria, and Eukarya.

Front

What is a food chain?

Back

A food chain is a linear sequence of organisms through which nutrients and energy pass as one organism eats another.

Front

What is the role of enzymes in biological reactions?

Back

Enzymes are biological catalysts that speed up chemical reactions in cells by lowering the activation energy required.

Front

What is homeostasis?

Back

Homeostasis is the process by which living organisms maintain a stable internal environment despite changes in external conditions.

Front

What is the difference between mitosis and meiosis?

Back

Mitosis is the process of cell division that results in two identical daughter cells, while meiosis is a type of cell division that reduces the chromosome number by half, producing four genetically diverse gametes.

Front

What is an ecosystem?

Back

An ecosystem is a community of living organisms interacting with their physical environment, including both biotic and abiotic components.