“are the basic units of life”

“is the portion of the cell outside the nucleus. As you will see, the nucleus and cytoplasm work together in the business of life.”

“These cell membrane channels facilitate, or help, the diffusion of glucose across the membrane. This process, in which molecules that cannot directly diffuse across the membrane pass through special protein channels”

“relatively constant internal physical and chemical conditions”

“are cells that enclose their DNA in nuclei”

“which appears as a stack of flattened membranes”

“The process by which particles move from an area of high concentration to an area of lower concentration”

“A group of organs that work together to perform a specific function ”

“are cells that do not enclose DNA in nuclei.

“ Eukaryotic cells contain an internal membrane system known as the endoplasmic reticulum”

“many cells contain water channel proteins,”

“is a group of similar cells that performs a particular function.”

“a fundamental concept of biology. The cell theory states:
• All living things are made up of cells. -Cells are the basic units of structure and function in living things. -New cells are produced from existing cells”

“are the biological equivalents of solar power plants”

“is the diffusion of water through a selectively permeable membrane”

“to which the signaling molecule can bind”