Write two basic structural differences between parenchyma and collenchyma tissues.

(N/A) The two basic structural differences are as follows:
$1$. Cell Wall: Parenchyma cells have thin cell walls made of cellulose,whereas collenchyma cells have unevenly thickened cell walls due to the deposition of cellulose,hemicellulose,and pectin at the corners.
$2$. Intercellular Spaces: Parenchyma cells are loosely packed with large intercellular spaces,whereas collenchyma cells are closely packed with very little or no intercellular space.