Xylem cells mature and harden and become so rigid that water can't diffuse into the cell. The cell dries and dies..
Proteobacteria (gram-negative bacteria)
Bacteria
animal cells only have a nucleus, cytoplasm and cell membrane but a plant cell has a cell wall, cell membrane, cytoplasm, chloroplasts, vacuole and nucleus.
The mature red blood cell lacks a nucleus, and so is unable to reproduce.
prokaryotic cell =)
Plant cells
a tight chain
animal cells only have a nucleus, cytoplasm and cell membrane but a plant cell has a cell wall, cell membrane, cytoplasm, chloroplasts, vacuole and nucleus.
When a bacteria cell lacks a nucleus (like most bacteria do), it is said to be a prokaryotic cell.
The mature red blood cell lacks a nucleus, and so is unable to reproduce.
prokaryotic cell =)
prokaryotic cell =)
A bacteria lacks a nucleus. It only has genetic material sitting in the middle of the cell, not inside a nucleus.
No. The nucleus is the part of the cell that holds the DNA. Plant cells have a nucleus, but a nucleus by itself is not a cell.
Prokaryote
Human red blood cells contain no nucleus. They lose them so that the cell can be packed full of as much hemoglobin as possible.
Most do, some don't. A mammalian red blood cell lacks a nucleus.
Prokaryote.
viruses...