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Plants are unique among the eukaryotes, organisms whose cells have membrane-enclosed nuclei and organelles, because they can manufacture their own food. Like the fungi, another kingdom of eukaryotes, plant cells have retained the protective cell wall structure of their prokaryotic ancestors.
Plants exhibit life cycles that involve alternating generations of diploid forms, which contain paired chromosome sets in their cell nuclei, and haploid forms, which only possess a single set. Animals are required to consume protein in order to obtain nitrogen, but plants are able to utilize inorganic forms of the element and, therefore, do not need an outside source of protein.
Thought to have evolved from the green algae, plants have been around since the early Paleozoic era, more than 500 million years ago. Cell Wall - Like their prokaryotic ancestors, plant cells have a rigid wall surrounding the plasma membrane. Chloroplasts - The most important characteristic of plants is their ability to photosynthesize, in effect, to make their own food by converting light energy into chemical energy.
Endoplasmic Reticulum - The endoplasmic reticulum is a network of sacs that manufactures, processes, and transports chemical compounds for use inside and outside of the cell. Golgi Apparatus - The Golgi apparatus is the distribution and shipping department for the cell's chemical products.
Microtubules - These straight, hollow cylinders are found throughout the cytoplasm of all eukaryotic cells (prokaryotes don't have them) and carry out a variety of functions, ranging from transport to structural support. Mitochondria - Mitochondria are oblong shaped organelles found in the cytoplasm of all eukaryotic cells. Nucleus - The nucleus is a highly specialized organelle that serves as the information processing and administrative center of the cell.
Peroxisomes - Microbodies are a diverse group of organelles that are found in the cytoplasm, roughly spherical and bound by a single membrane.
Plasmodesmata - Plasmodesmata are small tubes that connect plant cells to each other, providing living bridges between cells. Ribosomes - All living cells contain ribosomes, tiny organelles composed of approximately 60 percent RNA and 40 percent protein. Vacuole - Each plant cell has a large, single vacuole that stores compounds, helps in plant growth, and plays an important structural role for the plant.
Leaf Tissue Organization - The plant body is divided into several organs: roots, stems, and leaves.
In case you have more interest to cell structure and components we are glad to present you some interesting cell diagrams for you to explore further. One of the primary differences between animal and plant cells is that these have a cell wall made up of cellulose. Plant cells also are different because they use photosynthesis to covert sunlight into needed food for the plant.
Also plant cells, when viewed under a microscope, appear very different from animal cells because of the presence of a large vacuole, which exists in the cell’s cytoplasm.


The differences between these cells is more complex, but the primary differences exist in the above-mentioned ways. Robert Hooke - The first person to see cells, he was looking at cork and noted that he saw "a great many boxes. Rudolf Virchow - also reported that every living thing is made of up vital units, known as cells. Golgi Apparatus: A series (stack) of flattened, membrane-bound sacs (saccules) involved in the storage, modification and secretion of proteins (glycoproteins) and lipids destined to leave the cell (extracellular) and for use within the cell (intracellular).
Pinocytotic Vesicle: A membrane-bound vacuole formed by a specific type of endocytosis called pinocytosis.
Peroxisome: A membrane-bound organelle that contains specific enzymes imported from the cytoplasm (cytosol).
Glycolysis: An anaerobic oxidation pathway outside of the mitochondria in which glucose is oxidized to pyruvate with a net gain of 2 ATP molecules.
Mitochondrion: Membrane-bound organelle and the site of aerobic respiration and ATP production.
In eukaryotic cells, including the cells of your body, ATP is produced within special membrane-bound organelles called mitochondria.
Cristae: Inwardly-projecting, shelf-like membranes of the mitochondria where electrons flow along the cytochrome enzyme system. Chloroplast: Membrane-bound organelle and the site of photosynthesis and ATP production in autotrophic plant cells. Some biologists believe that mitochondria and chloroplasts within eukaryotic animal and plant cells may have originated from ancient symbiotic bacteria that were once captured by other cells in the distant geologic past.
Endoplasmic Reticulum: A complex system of membrane-bound channels extending throughout the cytoplasm of cells. Rough Endoplasmic Reticulum: Studded (dotted) with attached ribosomes on the side of the membrane that faces the cytoplasm.
Ricin from the castor bean (Ricinus communis) is a potent cytotoxic protein that is lethal to eukaryotic cells by inactivating the organelle sites of protein synthesis called ribosomes.
Nucleus: Membrane-bound organelle containing chromatin, a term applied to all the chromosomes collectively when they are in a tenuous (threadlike) stage. Large Central Vacuole: A membrane-bound, fluid-filled sac that occupies much of the volume of a plant cell. Amyloplast (Starch Grain): A membrane-bound organelle containing concentric layers of starch (amylopectin). Centrioles Nonmembrane-bound organelles that occur in pairs just outside the nucleus of animal cells. Centrosome: The microtubule organizing center that forms the mitotic spindle in dividing cells.
Mitosis is used to produce daughter cells that are genetically identical to the parent cells.


Meiosis is used to make special cells - sperm cells and egg cells - that have half the normal number of chromosomes. Some simple organisms - such as bacteria - can reproduce by simply dividing into two new individuals. You can find there animal cell structure, vegetal cell and much more interesting information.
This article also helps with biology As level but for As level the more complex detail is needed. Today when I read through this, I'm totally satisfied, and hope it will help me on my demonstration which is to be on Monday.
This helped a lot with my homework, but i just have one question: Why does a plant cell contain a cell membrane and a cell wall, but an animal only contains a cell membrane? During this process, electrons are shuttled through an iron-containing cytochrome enzyme system along membranes of the cristae which result in the phosphorylation of ADP (adenosine diphosphate) to form ATP (adenosine triphosphate).
The cell copies - or 'replicates' - its chromosomes, and then splits the copied chromosomes equally to make sure that each daughter cell has a full set.
The cell copies its chromosomes, but then separates the 23 pairs to ensure that each daughter cell has only one copy of each chromosome.
This cell then divided and divided to make more cells through a process called mitosis.Mitosis is a way of making more cells that are genetically the same as the parent cell. It plays an important part in the development of embryos, and it is important for the growth and development of our bodies as well. Sperm cells and egg cells contain 23 single chromosomes, half the normal number, and are made by a special form of cell division called meiosis.Meiosis separates the pairs of matching (or 'homologous') chromosomes, so that sperm cells and egg cells have only one copy of each. Moderator's reply: Thank you for reading wiseGEEK and participating in the discussion forums. Mitosis produces new cells, and replaces cells that are old, lost or damaged.In mitosis a cell divides to form two identical daughter cells. It is important that the daughter cells have a copy of every chromosome, so the process involves copying the chromosomes first and then carefully separating the copies to give each new cell a full set.Before mitosis, the chromosomes are copied. However, we always encourage our readers to do more research on topics if they want more details.
In Meiosis I, each daughter cell receives a mix of chromosomes from the two sets in the parent cell.
In addition, the chromosomes in each matching pair swap some genetic material before they are parted in a process called crossing over.
These processes produce new combinations of genes in the sperm cells and egg cells.The following diagrams set out the main stages of Meiosis I and Meiosis II in males.



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