Biology STAAR Review Category #2-#3

Front

What is the basic unit of life?

Back

The cell is the basic unit of life.

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 DNA?

Back

DNA carries genetic information and instructions for the development, functioning, growth, and reproduction of all known living organisms.

Front

What are the main components of a cell membrane?

Back

The main components of a cell membrane are phospholipids, proteins, cholesterol, and carbohydrates.

Front

What is the role of enzymes in biological reactions?

Back

Enzymes act as catalysts to speed up chemical reactions in the body without being consumed in the process.

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 is the difference between mitosis and meiosis?

Back

Mitosis results in two identical daughter cells, while meiosis results in four genetically diverse gametes.

Front

What is an ecosystem?

Back

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

Front

What is the significance of biodiversity?

Back

Biodiversity is important for ecosystem resilience, providing resources for food, medicine, and maintaining ecological balance.

Front

What are the levels of organization in biology?

Back

The levels of organization are: cell, tissue, organ, organ system, organism, population, community, ecosystem, and biosphere.