Life Science Midterm Review

The independent variable is the factor that is changed or controlled in a scientific experiment to test its effects on the dependent variable.

Prokaryotes and Eukaryotes.

Eukaryotes have a nucleus, while Prokaryotes do not.

The trachea, or windpipe, carries air to and from the lungs.

The skeletal system makes red blood cells and stores minerals.

Cell theory states that all living things are composed of cells, and living cells come only from other living cells.

The cell is the smallest unit of life that can perform all life processes.

Alveoli are tiny air sacs where gas exchange occurs, allowing oxygen to enter the blood and carbon dioxide to be expelled.

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

The endoplasmic reticulum is involved in the synthesis of proteins and lipids.