Do cells have cells?If not, then how is it possible to do what they do without cells?
455022
cells dont have cells but they they have organelles which are sort of like cells, which includes mitochondria, ribosomes, golgi apparatus, etc. that have various functions such as converting sugar to energy, synthesizing proteins, etc. they're sort of like minature organs if the cell was your body (hence the name organelles
793383
1)  The cell is the unit of structure, physiology, and organization in living things. \n   2)  The cell retains a dual existence as a distinct entity and a building block in the   construction of organisms. \n   3)  Cells form by free-cell formation, similar to the formation of crystals (spontaneous generation).\n\nKeep this as hint and do your homework
1039705
The cell is still made up of many atoms, thats the only irrefutable link there. And the atom is not the elementary essential of matter, if by elementary essential you are referring to the smallest constituent of a matter. Atom is made of of sub-particles: protons, electrons, neutrons, quarks... And these are further made up of smaller sub-particles (our knowledge are always limited). Proton and nuetron have masses and volumes. Doesnt that mean they are matter too?
706797
TRUE\nFirst of all all living cells do not produce energy from glucose only,but also from fats and proteins(during starvation).\nAnd then,most of the energy released is lost as heat energy.The remaining energy is stored as ATP( which is like a 'battery').Just as a battery can be 'plugged on' to different objects to produce light(torch),sound(tape recorder),etc so also the ATP can also be used as and when required to provide energy for locomotion,to produce light(glow worm),electricity(ray fish) etc.
1046768
this is a good question. what decides a cell living or nonliving is its metabolic activity. ..now you got me thinking... \n\nBut  to clear some confusion, they don't have nucleus, and that's why they can't reproduce by themselves.\n\nK...finally got some info from a very good friend, a hematologist. Here is what he says...\n\n"The question you asked is a very very deep one indeed.  In fact, we can have a very lively debate about it.  It is a very philosophical question, in that it's equivalent to asking, "Is virus a living organism?"  If we define life, as you say, by metabolic activities, then yes, red blood cell is a living cell.  Red blood cell uses the metabolic pathway of glycosis to generate energy.  It also has a variety of proteins and enzymes responsible for signal transduction.\n \nHowever, a red blood cell is a terminally differentiated cell and more than that it lacks the genetic material, the means and the mechanism to replicate.  Given that one of the primary goal of life is to have "offsprings" either through asexual replication or sexual duplication, red blood cell lacks that ability.  However, the progenitor of red blood cell (hematopoietic stem cells) does have the ability to replicate and differentiate."
72920
i dont understand what ur trying 2 ask but if this is the answer ur looking 4,than cells make up tissues, tissues make up organs, and organs make up organ systems.
528998
Yes.  The term'subcellular" would just mean it is comprised of peices smaller than a cell.\n\nThe term 'components' is simply a word for parts used for assembly.  \n\nMost of these parts are an integral part of the cell, meaning if you get rid of them you lose the cell.
819308
Cells. Cells are the basic unit of life. They make up every single living thing in the universe. Humans, plants, animal, bacteria, fungi, and every other living thing in the universe.
951836
All cells have cell membranes.  They both have DNA and a lot of other stuff common to all life forms.  The main difference is that animal cells don't have cell walls but plant cells do.  If I were God, I would make animal bone cells have cell walls.  That would be cool.
327646
Bacteria are not at all similar to cellular organisms.\n\nThey have no tissue or organs, since those are composed of cells.\n\nBacteria are much smaller and simpler than cells, although their DNA is surprisingly complex.\n\nBacteria are actually quite fascinating and they have many interesting facets that are not found at all in cellular organisms.  The flagellum, for example, in some varieties is powered by a tiny microscopic motor that is powered by acid.\n\nThe world of bacteria is only now beginning to be opened up through the relatively young science of microbiology.  I would encourage to read more about them if you think you would find it interesting.\n\nAfter seeing the other comments, I felt compelled to add that bacteria are NOT cells.
386073
The answer to your question is (C). \n\nEvery living organism is made up of one or more cells, all cells arise from preexisting cells, the smallest living organisms are single cells, and cells are the functional units of multicellular organisms.\n\n"Virus - a non cellular parasitic particle that consists of a protein coat surrounding a strand of genetic material; multiplies only within a cell of a living organism (the host)."
44587
That depends on the type of cell and its function.
239265
Without oxygen your cells would die.  The reason being oxygen is crucial to cellular respiration.  The classic metaphor is to compare cell respiration to a burning trash fire.  If you throw a blanket over the burning pile of trash you smother it (block the oxygen) and the fire goes out.  Without red bloods to carry oxygen to the cells the cellular fires would go out.   If you want to know more about cellular respiration, the Krebs Cycle, ATP and all that good stuff I suggest you start with the reference given below.  Meanwhile keep on asking questions.
379154
Living cells such as eukaryotes have many organelles such as: a nucleus, Mitochondria, Rough and smooth endoplasmic reticulum (rough has ribosomes on the surface of it), Golgi body, Lysosomes, cytoplasm, ribosomes and so on\nOther types of cells include prokaryotes, these don't have a nucleus or any other membrane bound organelles... they also have other organelles of which I can't really be bothered listing at the moment. hehe
875686
Somehow I doubt it. Amoebas as single-celled organisms do not have brains and therefore no memory -- all they have is what biological reflexes are encoded into their DNA, like aversion to strong light. To teach something a "trick", it has to have the capacity to associate the stimuli with a desired action and remember that one means the other. Doing that without a brain, I think, is nigh well impossible.
1059550
A plant cell has a cell wall.\n\nhttp://www.bbc.co.uk/schools/ks3bitesize/science/biology/lifecells2_3.shtml
67593
Stem cells are remarkable in that they can develop into all sorts of other specialised cells.\nOnce a cell is specialised it cannot change.\nStem cells therefore have the potential to replace cells that have been damaged by disease or injury.\n\nLook here: