Question

the cell is the basic unit of life. the following is a glossary of animal cell terms. all cells are surrounded by a cell membrane. the cell membrane is semipermeable, allowing some substances to pass into the cell and blocking others. it is composed of a double - layer of phospholipids and embedded proteins. plant cells have an additional layer surrounding them called the cell wall. the cell wall is made of nonliving material called cellulose. the centriole is the organelle that makes microtubules for the cytoskeleton. only animal cells have centrioles. microtubules are shaped like soda straws and give the nucleus and cell its shape. how does the rough er differ from the smooth er? a cell is the... what structure surrounds the cell? semipermeable means...

Explanation:

1. Rough endoplasmic reticulum (ER) has ribosomes attached to its surface, while smooth ER does not. Ribosomes on rough ER are involved in protein synthesis, and smooth ER is mainly for lipid synthesis and detoxification.
2. A cell is the basic unit of life as stated in the text.
3. All cells are surrounded by a cell - membrane. Plant cells have an additional cell wall.
4. Semi - permeable means allowing some substances to pass into the cell and blocking others.

Answer:

1. Rough ER has ribosomes attached to its surface; smooth ER does not.
2. Basic unit of life.
3. Cell membrane (cell wall in plant cells in addition).
4. Allowing some substances to pass into the cell and blocking others.