Biology STAAR 7A-7E (1B)

Front

What is the function of the cell membrane?

Back

The cell membrane controls the movement of substances in and out of the cell, providing protection and support.

Front

Define photosynthesis.

Back

Photosynthesis is the process by which green plants and some other organisms use sunlight to synthesize foods with the help of chlorophyll, converting carbon dioxide and water into glucose and oxygen.

Front

What is the role of mitochondria in a cell?

Back

Mitochondria are known as the powerhouse of the cell, as they produce energy in the form of ATP through cellular respiration.

Front

Explain the concept of 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 an ecosystem?

Back

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

Front

Define biodiversity.

Back

Biodiversity refers to the variety of life in a particular habitat or ecosystem, including the number of different species and genetic diversity.

Front

What is the difference between a food chain and a food web?

Back

A food chain is a linear sequence of organisms through which nutrients and energy pass, while a food web is a complex network of interconnected food chains.

Front

What are the main components of DNA?

Back

The main components of DNA are nucleotides, which consist of a phosphate group, a sugar (deoxyribose), and a nitrogenous base (adenine, thymine, cytosine, or guanine).

Front

What is the purpose of mitosis?

Back

Mitosis is the process of cell division that results in two genetically identical daughter cells, allowing for growth and repair.

Front

Define homeostasis.

Back

Homeostasis is the ability of an organism to maintain a stable internal environment despite changes in external conditions.