Tissue.
The biological hierarchy is:
Atom
Molecule
Organelle
Cell
Tissue
Organ
Organ system
Organism
Population
Ecosystem
Biosphere/Ecosphere
Easy answer: Compounds
Long answer: Organic molecules
Recommended reading: Isaac Asimov's The World of Carbon and The World of Nitrogen, published c1957-1968. This is probably the BEST introduction to biochemistry for a beginner ever written. It takes an extremely complexsubject and makes it extremely accessible.
Cells ---> Tissues -----> Organ ---->Organ System ----> Organism
thin covering
if u are pregnant does white fuild comes out ?
Cork comes from trees which are eukaryotic
red blood cells
Dead blood cells!
it comes from cells
thin covering
no, they don't. the energy for the cells comes from the ATP.
The cell membrane in animal cells. The cell wall in plant cells.
mitochondria
if u are pregnant does white fuild comes out ?
Cork comes from trees which are eukaryotic
yes that is a rule of cells that scientists have proven. all cells come from preexisting cells. how could life have started by itself?
Cells divide to produce cells of their own kind.All the cells thus comes from pre-existing cells.
Well one comes out of a dick, and the other is inside the vagina.
red blood cells
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