Endosymbiosis enabled the formation of true living cells. This concept explains the origin of two biological structures, the mitochondria and the chloroplasts.
... They are living ... Needs to be more specific
It is false.
No. Most cells are replaced eventually, but not all cells every day.
True. Viruses are smaller than bacterial cells. Bacterial cells are living organisms and are much larger in size compared to viruses, which are non-living particles that require a host cell to replicate.
"All living things are made of cells" would be a biological observation, and it's only true if we disqualify viruses.
true
Rouleaux formation is the stacking of red blood cells like a roll of coins, often seen in conditions like multiple myeloma. True agglutination is the clumping of red blood cells due to antibody-antigen interaction, such as in blood typing reactions. The key difference is that rouleaux formation involves cells stacking on top of each other, whereas true agglutination involves cells clumping together.
Not true. They both do. DNA is contained in all living cells.
true...
Of course they have a cell membrane.Every living organism have a membrane.
No. According to cell theory, the cell is the basic unit of all living things - therefore all living things are made of cells (some are made of a single cell, these are known as unicellular organisms).
True. A cell is the basic structural and functional unit of a living organism. All living things are made up of one or more cells, which perform necessary functions to sustain life.