air, heir aisle, isle
some sum son, sun
stair, stare stationary, stationery
steal, steel suite, sweet
tail, tale
<span>a Tell a story about rappelling into a cavern that can't be reached any other way.</span>
Answer:
A cell wall is a structural layer surrounding some types of cells, just outside the cell membrane. It can be tough, flexible, and sometimes rigid. It provides the cell with both structural support and protection, and also acts as a filtering mechanism.
