To show that lines are parallel, we draw small arrow marks on them. In the figure above, note the arrows on the lines PQ and RS. When we write about parallel lines there is a shorthand we can use. We can write which is read as the line segment PQ is parallel to the segment RS.
Lysosome[edit] Lysosomes are spherical bodies, or vacuoles that are enclosed by a single membrane. The membrane serves as a protectorate to the cell, since lysosomes contain harsh digestive enzymes, which would cause significant damage if exposed to cell content.
Answers: Lysosomes are organelles that carry the cell's digestive enzymes. Lysosomes have to be membrane bound. This is because of the enzymes. The digestive enzymes in the cell break down and recycle the unneeded materials in the cell.If the enzymes were allowed to float freely within the cytoplasm, the digestive enzymes would break down and recycle the entire cell-they're that strong.ysosomes have to be membrane bound. This is because of the enzymes. The digestive enzymes in the cell break down and recycle the unneeded materials in the cell. If the enzymes were allowed to float freely within the cytoplasm, the digestive enzymes would break down and recycle the entire cell-they're that strong.