The deer eat grass. Its droppings, which eventually decompose into the ground, provide minerals and vitamins to the plant roots. This food is vital for it so the plant remains alive and can produce oxygen which is essential for the deer and grass is also a food source for him too.
Flatworms have no need for circulatory and respiratory systems because they are able to actively diffuse oxygen through their skin and their body layout is such that they do not need to transport oxygen in order for it to get to their cells.
The chemical composition of glycocalyx is sugar and protein.
<h3>What is the glycocalyx?</h3>
The envelope formed by <em>glycoproteins, glycolipids and hyaluronic acid</em> located in the cell membrane is known as glycocalyx. This component works as a <u>mechanical cell protection</u> thanks to its composition, it also allows <u>cell adhesion</u> and <u>hormonal reception</u> by giving it a suitable environment for this reception.
The glycocalyx is not only seen in eukaryotic cells, but also in prokaryotic cells or in bacterial cells. Each type of cell has its different conformation of the glycocalyx, this <em>depends on its individual need</em>.
Therefore, we can confirm that the chemical composition of glycocalyx is sugar and protein.
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Answer:
The fossils in layer 4 is much older than the fossils in layer 1
