In the animal kingdom, what do cells group together to form?
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My first thought, is organs.\n\nBut let me look.\n\nNope, I was wrong they form together to form tissue.  The building block of all of us.
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Nearly all animals undergo some form of sexual reproduction. Adults are diploid or occasionally polyploid. They have a few specialized reproductive cells, which undergo meiosis to produce smaller motile spermatozoa or larger non-motile ova. These fuse to form zygotes, which develop into new individuals.\n\nMany animals are also capable of asexual reproduction. This may take place through parthenogenesis, where fertile eggs are produced without mating, or in some cases through fragmentation.\n\nA zygote initially develops into a hollow sphere, called a blastula, which undergoes rearrangement and differentiation. In sponges, blastula larvae swim to a new location and develop into a new sponge. In most other groups, the blastula undergoes more complicated rearrangement. It first invaginates to form a gastrula with a digestive chamber, and two separate germ layers - an external ectoderm and an internal endoderm. In most cases, a mesoderm also develops between them. These germ layers then differentiate to form tissues and organs.\n\nAnimals grow by indirectly using the energy of sunlight. Plants use this energy to turn air into simple sugars using a process known as photosynthesis. These sugars are then used as the building blocks which allow the plant to grow. When animals eat these plants (or eat other animals which have eaten plants), the sugars produced by the plant are used by the animal. They are either used directly to help the animal grow, or broken down, releasing stored solar energy, and giving the animal the energy required for motion. This process is known as glycolysis.
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plant cells form a disk during the final splitting phase, while animal membranes constrict.  Also, it is easier to see earlier in animals, and animals have centrioles, plants dont.  thats all my textbook says.  the phases and everything are the same, though.
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Cell bio would encompass all things on a cellular level.\nUsually organisms with a "life of their own".\nMolecular bio goes further into the atomic level.\nEg: a molecule of water (H2O) consists of 3 atoms. take a H away and you have Hydrogen peroxide(HO). A cell is usually made up of many different molecules when added together, make an organism like a liver cell, cancer cell, stem cell,etc...
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Organ is a the correct answer but still if your wondering how it works look back in any basic biology text book where it talks about Levels of Organization.As anyliving thing unicellular to multicellular organism is based on level of organization.\nFor example, ORGANELLE-----CELLS--\n-TISSUE--ORGANs----ORGAN SYSTEM\nAs you already know Tissues are made up of cells rigth so what makes an organ is a group of tissues and in order to have organ system you need different organs a simple example is digestive system where you G.I.tract,stomach,intesitne,pancrea,liver,gall bladder all playing some important role in the functioning of the body.
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They grow, one cell at a time.
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an organism composed of one or more cells containing visibly evident nuclei and organelles
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1. Kingdom Monera [10,000 species]: Unicellular and colonial--including the true bacteria (eubacteria) and cyanobacteria (blue-green algae).\n\n2. Kingdom Protista (Protoctista) [250,000 species]: Unicellular protozoans and unicellular & multicellular (macroscopic) algae with 9 + 2 cilia and flagella (called undulipodia). \n3. Kingdom Fungi [100,000 species]: Haploid and dikaryotic (binucleate) cells, multicellular, generally heterotrophic, without cilia and eukaryotic \n4. Kingdom Plantae [250,000 species]: Haplo-diploid life cycles, mostly autotrophic, retaining embryo within female sex organ on parent plant. \n5. Kingdom Animalia [1,000,000 species]: Multicellular animals, without cell walls and without photosynthetic pigments, forming diploid blastula.
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Starting with the fact that all are single cell layers. They all have a nucleus, cell membrane, ribosomes, mitochondria,
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Mitosis, also called karyokinesis, is division of the nucleus and its chromosomes.  It is followed by division of the cytoplasm known as cytokinesis.  Both mitosis and cytokinesis are parts of the life of a cell called the Cell Cycle.  Most of the life of a cell is spent in a non-dividing phase called Interphase.  Interphase includes G1 stage in which the newly divided cells grow in size, S stage in which the number of chromosomes is doubled and appear as chromatin, and G2 stage where the cell makes the enzymes & other cellular materials needed for mitosis.\n\nMitosis has 4 major stages --- Prophase, Metaphase, Anaphase, and Telophase. When a living organism needs new cells to repair damage, grow, or just maintain its condition, cells undergo mitosis.\n\nDuring Prophase, the DNA and proteins start to condense. The two centrioles move toward the opposite end of the cell in animals or microtubules are assembled in plants to form a spindle. The nuclear envelope and nucleolus also start to break up.\n\n\nProphase\n\nDuring Metaphase, the spindle apparatus attaches to sister chromatids of each chromosome. All the chromosomes are line up at the equator of the spindle. They are now in their most tightly condensed form.\n\n\nMetaphase\n\nDuring Anaphase, the spindle fibers attached to the two sister chromatids of each chromosome contract and separate chromosomes which move to opposite poles of the cell.\n\n\nAnaphase\nIn Telophase, as the 2 new cells pinch in half (animal cells) or a cell plate forms (plant cells), the chromosomes become less condensed again and reappear as chromatin. New membrane forms nuclear envelopes and the nucleolus is reformed.
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Erm... you're alive?\n\nThe mesoderm is a layer of cells that forms during embryogenesis in animals that have bilateral symetry (i.e. as opposed to radial symmetry). From this layer, all your organs form.\n\nFormed at the same time as the mesoderm is the ectoderm (from which your skin and neural tissue forms) and the endoderm (from which your gut and digestive tract form)
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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
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An organism can be described as a combination of organ systems in a anatomical point of view.But if u want to know \nhow organs,made separately as independent entities are combined to form the organ, then there is no answer for that.\nfor your information during development after gastrulation,organogenesis occurs and this leads to formation of organs and by virtue of all the organs we can see development of organism.Organogenesis is a complex mechanism and this involves,complex communication betwwen cells of difeerent germ layers,differential gene expression,cell movement,development of protien gradient,discreet comparmentisation and many more .
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The cytoplasm containing the other cell parts.
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Many ways.\n\nPlants would have organelles specific to a plant and would be a rectangular shape with 2 nuclei during cytokinesis\n\nanimal would have no chroloplasts and would be oval because the nuclei push as far apart as possible and the animal cell is flexible, not rigged like a plant.
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Cytokinesis is the final stage of cell reproduction; it is the division of the cytoplasm into approximately equal halves, resulting in a roughly equal distribution of organelles in each of the daughter cells. Cytokinesis usually begins in telophase. We will discuss cytokinesis separately for organisms which do not have a cell wall (mostly heterotrophs) and those which do have a cell wall (generally autotrophs).\n\nFor a cell without a cell wall, cytokinesis begins with the pinching inward of the cell membrane caused by the action of a ring of special contractile proteins called actin and myosin. The pinching inward forms a deep grove, often called the cleavage furrow. Eventually, the opposite sides of the furrow meet and the cell splits into two new daughter cells.\n\nWhereas cytokinesis in cells lacking a cell wall occurs through a pinching inward, organisms with a cell wall undergo a process through which a so-called cell plate is built from the middle of the cell outward to the membrane. Vesicles from the Golgi bodies flatten and fuse in the center of the cell, forming the cell plate, which elongates toward the cell membrane as more vesicle are added. When the cell plate reaches the cell membrane, the parent cell is effectively separated into two new daughter cells, which then proceed to build a cell wall along the cell plate.
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one celled organism are organism which consists of only one cell.examples are Amoeba,euglena and paramecium while  many-celled organism or muticellular organisms consists of two or more cells.Examples are man,bird,hydra,flowering plants,volvox ,hydra and fish