STAAR Biology EOC practice test

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, algae, and some bacteria convert light energy into chemical energy in the form of glucose, using carbon dioxide and water.

Front

What is the role of mitochondria in a cell?

Back

Mitochondria are known as the powerhouse of the cell, as they produce energy (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 the difference between prokaryotic and eukaryotic cells?

Back

Prokaryotic cells lack a nucleus and membrane-bound organelles, while eukaryotic cells have a nucleus and organelles.

Front

Define ecosystem.

Back

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

Front

What is the purpose of DNA replication?

Back

DNA replication is the process of copying DNA to ensure that each new cell receives an exact copy of the genetic material.

Front

What are the main components of a nucleotide?

Back

A nucleotide consists of a phosphate group, a sugar molecule, and a nitrogenous base.

Front

Explain the term 'biodiversity'.

Back

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

Front

What is the significance of the scientific method?

Back

The scientific method is a systematic approach to inquiry that helps scientists investigate phenomena, acquire new knowledge, or correct and integrate previous knowledge.