how many different types of cells?
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There are many different kinds of cells. Eukaryotic (mostly all animal, fungi, and plant cells), Prokaryotic (bacteria), and then there are specialized cells in most organisms. I.E. storage cells, bacteria-fighting cells, hormone producing and recieving cells. I am not sure that there is a set number of different kinds. However, the Prokaryotic and Eukaryotic division is the beginning of differentiation among all cells. It is used to help differentiate different kingdoms of organisms.
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Meiosis: -- One cell becomes 4 cells--There are 4 new "daughter" cells. Each new gamete cell contains only one-half of the number of chromosomes of the parent cell. Each sex cell goes through the division process twice in order to have the correct number of cells, and the correct chromosomal information.\n\nMitosis: -- One cell becomes two cells-- The new "daughter" cell has exactly the same number of chromosomes and information as the "parent" cell. 1 cell divides and becomes 2 cells.
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150 sperm cells....\nbecause each secondary spermatocyte shall become a spermatid each...and each spermatid produces a sperm cell.... therefore, a sec. spermatocyte only produces a single sperm cell...
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cells that have the potential to differentiate into any kind of cell type
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single cell organisms
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Depends on the cell type labile, stable, non regenerative etc
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a group of cells form a tissue
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32...\n\ngametes (16)are haploid....somatic body cells are double that number.....32
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there are 3 basic kinds-epithelial cell shapes and they all vary in their dimensions. Which one are you needing?  Also cell size varies somewhat depending on the organism you find the epithelium in, whether it be one species or several species.\n\nsquamous?\ncuboidal?\ncolumnar?\n\ncolumnar are biggest, squamous are thinnest. Cuboidal are probably the smallest on the average.
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it depends on the spinach, I am guessing in the 10s of thousands. Each cell has many, each leaf has many cells.
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46 chromosomes or 23 pairs of chromosomes per cell, consisting of 22 pairs of autosomes, and two sex chromosomes; considering the body has over a trillion cells...\n That is basically 46,000,000,000,000 chromosomes!\nThere are some rare cases when there is an extra chromosome(ex: Downsyndrome) or one less chromosome in each cell.
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some cells to take in more. Cell permiablility.\n\nhttp://www.answers.com/topic/cell-permeability
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multicellular organisms
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Do you mean "multi-celled"? The term "multi-celled" when applied to a plant or animal means that the organism is made up of several different cell types. The first multi-celled animals (metazoa) evolved over 600 million years ago. \n\nPrimitive metazoa can be grouped in three basic categories: sponge-like animals, cnidarians, and worms. The sponges, and cnidarians (corals and sea anemones), are the most primitive with about 11 specialized cell types. Worms and higher metazoa have approximately 55 specialized cells.\nWith the close of the Precambrian (545 mill. years ago), much of the Ediacara Biota (oldest animal-like multi-celled fossils) would become extinct. Many of them seem to be "failed experiments" in the evolution of life on Earth that became extinct just before the Cambrian "Explosion" of Life. Other Precambrian fossils do appear to be from the ancestors of modern animals. It is generally agreed that simple burrows and trace-fossils (such as Helminthopsis) found in upper Precambrian rocks were made by primitive worms. These worms, and some other members of the Ediacara Biota, survived the extinction event and took part in the greatest evolutionary event in Earth's history: The Cambrian "Explosion" of Life. Within 35 million years of the end of the Precambrian, representatives of essentially all modern phyla were present in the Cambrian seas.\n Hope that helps.
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The cell is the structural and functional unit of all living organisms, and is sometimes called the "building block of life." Some organisms, such as bacteria, are unicellular, consisting of a single cell. Other organisms, such as humans, are multicellular, (humans have an estimated 100 trillion or 1014 cells; a typical cell size is 10 µm, a typical cell mass 1 nanogram).\n\nThe cell theory, first developed in 1839 by Schleiden and Schwann, states that all organisms are composed of one or more cells; all cells come from preexisting cells; all vital functions of an organism occur within cells, and cells contain the hereditary information necessary for regulating cell functions and for transmitting information to the next generation of cells.
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humans have an estimated 100 trillion cells...
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If the total number of cells you finish with at the end of what I assume is mitosis is 36, then you began with 18 cells, which I suppose is 50%. Is that at all what you are asking?