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.
Explanation:
A cell wall is a rigid, semi-permeable protective layer in some cell types. This outer covering is positioned next to the cell membrane (plasma membrane) in most plant cells, fungi, bacteria, algae, and some archaea.
hope this helps
I do think that they close to not allow too much of either water or air from entering.
the hollow tube allows water to flow easily.
https://www.bbc.co.uk/bitesize/guides/z28g7p3/revision/1
Breakdown of carbohydrates begins in mouth with the help of enzyme salivary amylase.
The more biodisverse the ecosystem it is, the more niches are occupied, and the more resilient it is for issues that can occur, the ecosystem can be more stable
<span>The technique that uses the images from several telescopes to produce a single image is called 'Astronomical interferometery. By combining images from several telescopes, it is possible for astronomers to create detailed images with high resolutions. </span>