what are the three main differences between plant cells and animal cells?
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the shape of animal cell can be altered while plant cell have a fixed shape. \nplant cell have cell wall but animal cell have none. \nplant cell have ssap vacoule but animal cell have none  ( if there was one it is really small).\n\nother differences if you would like to know\nthe plant cell nucleus is at one side while the animal cell nuclues is centrally located.\nthe presence of chloroplast in plant cell while animal cell have none.
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Plant cells differentiate in many tissues, like leaf, xilem, phloem, root and many others. It's the same for us, an animal cell can differentiate into a liver cell, a brain cell, a skin cell....\nPlants, unlike us, have regions of undifferentiated cells, called meristems. The main meristem of the shoot is at the top, called the terminal bud. Theese cells divide and produce the elongation of the shoot, and as they become more and older they produce new shoot, leafs and stuff.\nOther meristems, axial buds, are kept right in the place where the leaf meets the shoot. When this buds start growing in the same way the terminal buds do, branches arise.\nOther regions of meristematic tissue are right between the phloem (where the sap flows) and the xilem (where the water flows) all along the shoot. This region is called the Vascular Cambium.\n\nNormally, the terminal bud secretes hormones to the sap that keep the other meristematic tissues at rest. This is to avoid a lot of branches beeing produced before the roots can cope with the water demand of a lot of leafs.\nWhen you cut the shoot, the terminal bud dissapears, so the axial buds and even the cambium start dividing and differentiating into new shoots. \nThe reason why this new growth happens near the cut is because this would be the youngest axial buds and cambium, and therefore the most active ones (or the ones that can more readily be activated).
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In angiosperms there is fruit as well as seed formation. \nIn gymnosperm ther is only seed formation but no fruit formation, this is the most important and major difference between them.\nEdit-: The difference I quoted   above   is the major and the fundamental one. The other differences are as follows:- Gymnosperms are all trees, some of them are very tall and massive. The Angiosperms,\n on the other hand, can be trees, herbs as well as shrubs.\n Internally (Anatomically speaking) Gymnosperms  have; Tracheids in xylem and sieve cells in phloem , companion cells are absent. Their xylem walls have bordered pits.\nIn Angiosperms, true vessels i.e. tracheae are present in xylem. Sieve tubes and companion cells are present in phloem. Their xylem walls show simple pits.\nGymnosperms are more ancient than the Angiosperms.\n I only hope that you understand the botanical terminology in the above text.
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animal cells don't have a cell wall
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I would just talk about way plant and animal cells are constructed like cell walls and stuff. And talk about differences in how they make energy like animals burn sugar and plants first make sugar themselves. I'm sure that could be used to discuss nutrients issues.
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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
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The main difference between gymnosperms and angiosperms is that the ovules and the seeds of gymnosperms are unprotected unlike the seeds of angiosperms which are enclosed in fruit.
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I can think of a few:\n\nFungi are actually more closely related to animals. They get their food from living matter.\nHowever, they are different from animals because:\n\nThey absorb their food instead of ingesting it.\n\nThey have cell walls.\n\nThey are stationary, like plants.\n\nThey are different from plants because:\n\nThey are heterotrophs.\n\nThey lack roots.
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First, the cell wall's function is to protect the plant cell.\nCell membrane - protects inner components of the cell from the outer environment. The rest are describe in the following website which you can go to.
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Human cells and animal cells are very similar. Actually, human cells are types of animal cells. Every different tissue in your body is made up of different kinds of cells. They may have different structures, especially in their cell membrane, which make the function of that cell different. Therefore they do have similar functions, depending on their structure and characters.
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You could say the nucleus is everything to a cell.\n\n-It controls cell division-a cell without a nucleus cannot reproduce because the nucleus contains chromosomes which hold all the 'information' about a cell.\n-It basically controls all the metabolic activities of the cell, like the type of enzymes to be produced, protein synthesis etc.\n-In doing this, the nucleus determines what a particular cell will be like e.g. a guard cell; root hair cell. Without a nucleus, I guess all plant cells would be identical because they wouldn't know what each of their function is.
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Chloroplast not only have a membrane but they have two an outer and inner. I would go with ribosomes. Everything else has a cell membrane.\nWell this is if you consider the question to ask if the organelle itself has a membrane or the cell in which the orgnelle is contained has a cell membrane.\nI took Ap Bio 2 years ago but I believe the a plant cell also has a cell membrane even though it has a cell wall. The wall keeps them from bursting when they get too much water through osmosis. An animal cell would burst.
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animal cells are smaller and more numrous
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A Eukaryote cell is a cell with a nucleus.  A prokaryotic cell is a cell without a nucleus.  Eukaryotic Cells usually refer to the complex cells of multicellular organisms such as animals plants and fungi, whereas many simpler unicellular organisms are made up of the simpler prokaryotic cells.  \n\nA nucleus is the command center of the cell and stores genetic information.  In eukaryotic cells the genetic information is stored in the cytoplasm, or gooey substance that makes up the inside of the cell.
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plant cells have cell walls to give them structure. they would be more box shaped where as animal cells would be more rounded since they dont have a cell wall.
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Centrioles are found only in animal cells. Also, in plants, cell division mainly takes place in special regions called meristems. These rapidly dividing areas will either elongate the tips of the plants' stems and roots or expand their width. In animals, cells divide everywhere. Cytoplasmic division is also different in plant cells. Plants divide the two daughter cells by building new cell walls rather than by cleaving (pinching in two) as animal cells do.
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For Plant cells:\n\n1)Parenchyma cells:\n--Primary walls that are rel. thin and flexible, no secondary walls\n-- perform most of the metabolic activity of the cell (photosynthesis etc)\n-- Retain the ability to divide and differentiate\n\n2)Collenchyma cells:\n-- thicker primary walls, no secondary walls\n-- help support young parts of plants\n\n3)Sclerenchyma cells:\n-- thick primary and secondary walls\n-- Can no longer elongate, so occur in parts of the plant that have stopped growing\n-- dead at maturity\n\ntwo catergories: sclereids and fibers\n\n4)Water conducting cells of the xylem\n-- tubular, elongated cells\n--dead at maturity\n\n2 categories:\na) Tracheids: long, thin\nb) Vessel elements: wider, shorter, thinner walled\n\n5) Sugar conducting cells of the phloem\n\n-- Alive at functional maturity:\n* Sieve tube members are the main components of the phloem\n* Companion cells, which facilitate loading sugars