what are the parts of a leaf?
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A  Epidermis \n\nThe blade consists of an upper and lower epidermis and a spongy layer of tissue, called the mesophyll. Running through the mesophyll is a branching system of veins.\n\nThe epidermis is the leaf blade's skin. It is a thin, usually transparent, colorless layer of cells that covers both the upper and lower surfaces of the blade. The epidermis prevents the leaf from losing excessive amounts of water and protects it against injury.\n\nIn most plants the epidermis is covered with cutin, a waxy substance secreted by the epidermal cells. The layer of cutin, called the cuticle, is responsible for the glossy appearance of some leaves. The cuticle gives the leaf additional protection by slowing down the rate at which water is lost. Generally, the cuticle is thinner on the epidermis on the underside of the leaf than on the upper epidermis, which is exposed to the sun.\n\nIn many kinds of leaves, hairs grow from the epidermis. The soft hairs of plants such as the mullein give the leaves a woolly or feltlike texture. In some plants the epidermal hairs secrete fluids. For example, in geraniums and petunias the hairs secrete a fluid that gives the leaves a clammy texture. The strong-smelling oils of the peppermint and spearmint plants come from epidermal hairs. In other plants, such as the nettle, the epidermal hairs are stiff and contain a poisonous fluid that produces a skin irritation when a person is pricked by them.\n\nB  Guard Cells \n\nScattered throughout the epidermis are pairs of bean-shaped cells, called guard cells. Guard cells contain chloroplasts, which are tiny granules filled with the green pigment chlorophyll. Chlorophyll gives leaves their characteristic green color. Chloroplasts enable leaves to carry on photosynthesis because they are able to absorb carbon dioxide and sunlight, which are required for the food-making process. In response to heat and light, each pair of guard cells pulls apart, and a tiny pore forms between them. The pores, called stomata, open to the outside atmosphere.\n\nWhen the stomata are open, carbon dioxide and oxygen pass either in or out—when carbon dioxide enters, it takes part in photosynthesis, the food-making process that releases oxygen as a waste product. This oxygen passes out of the leaf. At the same time, oxygen also enters the leaf, where it takes part in respiration, a process that forms carbon dioxide as a waste product. This carbon dioxide passes out through the stomata. Water also passes out of the open stomata in the form of a vapor. This process is called transpiration. Generally, there are more stomata on the under surface of a leaf than on the upper surface. This prevents water from evaporating too quickly or in excessive amounts from the leaf's upper side, which is exposed to the sun. Stomata close at night, providing another level of water conservation.\n\nC  Water Pores \n\nIn addition to the stomata, many kinds of leaves have large specialized water pores in their epidermis. These pores, called hydathodes, permit guttation, the process by which a plant loses liquid water. Unlike the stomata, hydathodes remain open all the time.\n\nGuttation takes place only when water is being rapidly absorbed by the roots, such as after a heavy rainfall, and when transpiration slows down, as on cool, humid nights. When these conditions occur together, droplets of water can be seen on the leaf early in the morning before they evaporate in the heat of the day. Unlike dew, which condenses on leaves from water vapor in the air and covers the entire leaf surface, guttation droplets form only on the edges and tips of leaves. Generally, the droplets are noticeable only on the leaves of strawberries and a few other kinds of plants.\n\nD  Mesophyll \n\nThe mesophyll, sandwiched between the upper and lower epidermis, consists of many thin-walled cells that are usually arranged in two layers. The palisade layer is next to the upper epidermis. It consists of cylindrical cells t
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the flower is what separates it from other plants, attracting birds and insects to pollenate the plant. however the plant requires all of its "parts" for survival, eg leaves with chlorophyll for photosynthesis, roots for water and ion uptake, and the stem with the xylem and phloem for water nutrient transport. so, no part is superior to another, but the flower appears to be the most "advanced" part.
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it is a leaf that could come from a thing that maybe you might water...hmmm
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1 stoma (can close on its own, most of them located on leaves), \n2 lenticela (cant close on its own - the tiny dots we can best observe on some woody stalks)\n\npersonally i would also count all the extracellular space inside plants - the quite elaborate system of interconnected cavities that takes the air through the inside of a plant to everyplace where necessary
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1) nucleus\n2) vacoule\n3) cell membrane\n4) cytoplasm\n5) chromosomes
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The mesophyll is the leaf tissue where most of the chloroplasts are found and photosynthesis takes place. The mesophyll is differentiated into the palaside mesophyll and teh spongy mesophyll. \n\nThe palaside mesophyll is made up of one or more layers of narrow, elongated parenchyma cells; these cells have a higher concentration of chloroplasts, and therefore these are the cells in which most of the photosynthesis takes place. \n\n----\nOf course - photosynthesis takes place in *all* the cells which have chloroplasts. But I don't think that is what this question is about.
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Plant cell:\n1. has a cell wall outside plasma membrane.\n2. contains chloroplast\n3. has a single large vacuole\n4. has dictyosomes instead of mitochondria.\n\nAnimal cell:\n1. donot have a cell wall. cytoplasm is surrounded by plasma membrane.\n\n2. lack chloroplast\n3. vacuoles absent. if present they are smaller and more in number.\n4. contain mitochondria which are sites of energy production.
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Meristem\nFrom Wikipedia, the free encyclopedia\nJump to: navigation, search\n\nA meristem is a tissue in plants consisting of undifferentiated cells (meristematic cells) and found in zones of the plant where growth can take place - the roots and shoots.\n\nDifferentiated plant cells generally cannot divide or produce cells of a different type. Therefore, cell division in the meristem is required to provide new cells for expansion and differentiation of tissues and initiation of new organs, providing the basic structure of the plant body.\n\nMeristematic cells are analogous in function to stem cells in animals, are incompletely or not at all differentiated, and are capable of continued cellular division (youthful). Furthermore, the cells are small and protoplasm fills the cell completely. The vacuoles are extremely small. The cytoplasm does not contain differentiated plastids (chloroplasts or chromoplasts), although they are present in rudimentary form (proplastids). Meristematic cells are packed closely together without intercellular cavities. The cell wall is a very thin primary cell wall.\n\n                                       ***\n\nThe answer is definitely meristems. Endodermis is the outer layer of a leaf, parenchyma are the dividing cells that usually make up meristems and most soft parts of the plant, while protonema are green filaments on moss.
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Sounds like 1st yr HS biology homework.  Here´s a hint:\nBoth have a nucleus, DNA material, function similarly.\n\nThe rest should be in your text book, just look at the two diagrams and list the similar inner parts of the cells.\n\nOne more hint:\nHow they differ-\nPlant cells have rectangular shapes and have chloroplasts w/ chlorophyl.\n\nAnimal cells are round.
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spines ( really curled up leaves)
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Vascular tissue is a complex tissue found in vascular plants. The primary components of vascular tissue are the xylem and phloem. These two tissues transport fluid and nutrients internally. There are also two meristems associated with vascular tissue: the vascular cambium and the cork cambium. All the vascular tissues within a particular plant together constitute the vascular tissue system of that plant.
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Leaves are green because they have a substance called chlorophyll in them.  Chlorophyll molecules absorb blue light and some red light with the other colors reflected which results in the green color seen in leaves.
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palmately compound leaves are a subtype of leaves which are called compound leaves. these types of leaves are called compound because a number of small leaf blades arise from one petiole, which is a stemlike structure that connects the leaf to the stem.\n\npalmately compound leaves are arranged like your fingers which all join at your palm, thus the name. The leaflets of a palmately compound leaf come together at a central point. one example of a leaf that assumes this kind of arrangement is the leaf of a horse chesnut.
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all plant life have rectangle shaped cells
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I would say it is the leaf of a plant or the plant itself.  The leaf gives off oxygen (the waste product) during photosynthesis.\n\nOr: (I grabbed this off Wikipedia)\nphotosynthesis uses water as an electron donor which is oxidized into molecular oxygen by the absorption of a photon by the photosynthetic reaction centre.
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Leaves have characteristics for many reasons. It helps them survive cause of the shape of the leaf. Over the years, the leaves have discovered the easiest way for water to get to the tips of the leaves, and throughout the leaf itself. Some leaves excrete some gooey substance so no predators will eat their leaves. They shape themselves for water intake, some have a waxy substance on them for safety, some are simple, others are very detailed. I still don't know why they take the shape they do. The leaves will change colour according to the season, because basically they get tired from constantly performing photosynthesis all during the summer. So, in fall they take a break, and stop photosynthesizing. That's why they change colour in the seasons. It really is quite interesting. I will let you know the pages I used. One is a little kids site, and the other is an adults site. GOOD LUCK AND GOD BLESS YOU!
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A plant cell has a cell wall.\n\nhttp://www.bbc.co.uk/schools/ks3bitesize/science/biology/lifecells2_3.shtml