Plants and some types of archaea or bacteria use photosynthesis to create food.
The tissue in which all cells contact the basement membrane, even though some appear (at first glance) to be stacked on top of others, is called pseudostratified <span>columnar epithelium.
</span> The pseudostratified columnar epithelium has epithelial cells whose nucleis are at different levels.
<span>The upper respiratory tract epithelium is example of this type of epithelium.</span>
1) a five carbon ribose sugar
2) a phosphate molecule
3) one of four nitrogenous bases: adenine, guanine, cytosine or uracil
je ne comprends pas ton questiom
