Recent Changes

Root System
water and nutrients.nutrients and absorb them from the soil and then begin to travel them up to disperse to the rest of the plant. Plants can also act as storage sites for food reserves. Water doesn't come to roots nearly as much as roots must come to water. Roots constantly have to grow to adapt to new water supplies. This constant need for water helps with the process of photosynthesis. Each plant
A taproot system can be described as a large central root with numerous smaller lateral roots extending from that (ex: carrot). This large central root provides a strong anchor for the plant in the soil. Sometimes it is also used for food storage including a buildup of starch and water storage. The smaller, lateral roots serve as the main source to the central root for water and nutrients. Sections of this taproot system can create a new plant.
A fibrous root system consists of many roots that are all the same size; it has no predominant root. This root system has a large surface area to volume ratio (meaning that there is more area of the root touching the soil then there is actual volume of the root) making it effective in gathering nutrients. It also helps to anchor the plant and prevent soil erosion. Both of these systems have a threadlike extension (elongated cells) of their roots called root hairs.
throughout the plant.plant as the transport system. They carry the plant. Vascular bundles refers to collections of tubes through which fluid materials move from one part of the plant to another.
Within a plant. It conductstransports water and inorganic nutrients. The xylen is the tissue through which water and dissolved minierals flow in vascular plants. Xylem cells the stomata. A xylem consists of vessel elements and tracheids which are two types of fluid conducting cells. These cells die off before the point of maturity. The basistubes are essentially just strands of thisempty cells that have been cleared out. The walls of these cells are strengthened with cellulose and lignin that enables the load-bearing capacity.
Transpiration is the process that results once or sugar) and some hormones throughout the is stored. Phloem contains a sieve element who's job is to do the actual nutrient conducting. It doesn't die at maturity but it loses it's cell nucleus including all DNA. Every sieve element has an associating with a companion cell that retain its DNA and does all the housekeeping needs. The nucleus is removed to make extra space for the rapid flow of food through it.
{http://kvhs.nbed.nb.ca/gallant/biology/xylem__phloem.jpg} http://kvhs.nbed.nb.ca/gallant/biology/xylem__phloem.jpg
Environmental System
the plant. Hormone production is a more diffuse process that in collections of cells carry out a range of different functions. There are in the plant.plant and the falling off of the leaves. They are light source. Also, auxins help differentiate between xylem and phloem tissue. Ethylene are gas and effectaffect the ripening and the droppingpromotion of leavesthe falling off of nearby plants.leaves. It is also responsible for slowing down of the lateral bud growth For example, factors that effectaffect a plant winter season to allow for seasonal adaptation. (http://www.wisegeek.com/what-is-photoperiodism.htm). Another is the bending, curvature and growth of light source. This is because plants produce their own food and light is necessary for that production. Phototropism is the plant's response when sunlight becomes blocked by another plant or some other physical object. When the the plant. When light hits one side of the shoot, it causes auxin to move to the other side where it acts to lengthen the cells on the far side. This effects makes the shoot curve towards the light.
{phototropism.png}
As the picture shows, the hormone auxin shifts to the dark side of the plant signaling to the cells to elongate themselves on a certain side of the plant. This process causes the bending of the plant toward the light source.
Another process of the plant responding to the environment is called photoperiodism.
grow down toward the water and minerals that the plant needs, and the stemsshoots want to grow upwards.upwards to access the sunlight. Roots have to survive. For example, if a root's tip were to be snipped off then there would be no bending with regards to gravitropism, but instead a continuation of straight horizontal grows. It shows that cells or substances in the root cap are essential for root gravitorpism. Similarly to

The main purposes of roots are to stabilize the plant in the soil while also absorbing water and nutrients. Each plant has its own root system. These systems include either a taproots system or a fibrous root system.
A taproot system can be described as a large central root with numerous smaller lateral roots extending from that (ex: carrot). This large central root provides a strong anchor for the plant in the soil. Sometimes it is also used for food storage including a buildup of starch and water storage. The smaller, lateral roots serve as the main source to the central root for water and nutrients. Sections of this taproot system can create a new plant.
surface area to volume ratio (meaning that there is more area of the root touching the soil then there is actual volume of the root) making it
The vascular bundles consist of the xylem and phloem and run throughout the plant. They carry water to the leaves and carry sugar from photosynthesis throughout the plant.
Within a plant there are two main vascular tissues: the xylem and the phloem. The xylem is a principal vascular tissue within the plant. It conducts water and helps to dissolves inorganic nutrients. Xylem cells are stacked together to form a pipeline/tube throughout the plant from the root to the tips of all the leaves. The xylem is also involved in a process known as transpiration, serving as a tube to carry the water up the plant out the stomata. The basis of this process results once the water has evaporated from the plant and there is open space within the leaf. This space then creates a type of "suction" that is then filled by more water until it reaches the xylem. Once the water has reached the xylem the process of cohesion of hydrogen bonds between water molecules allows water to be transported, against gravity, up the plant. Also at work is the role of adhesion of the water molecules to the sides of the xylem helping with the transpiration stream of water.

Root System
The main purposes of roots are to stabilize the plant in the soil while also absorbing water and nutrients. Each plant has its own root system. These systems include either a taproots system or a fibrous root system.
that (ex: dandelion).carrot). This large
A fibrous root system consists of many roots that are all the same size; it has no predominant root. This root system has a large surface area making it effective in gathering nutrients. It also helps to anchor the plant and prevent soil erosion. Both of these systems have a threadlike extension (elongated cells) of their roots called root hairs.
The vascular bundles consist of the xylem and phloem and run throughout the plant. They carry water to the leaves and carry sugar from photosynthesis throughout the plant.

Cell Function
Cell walls are nearly always present in plant cells. It is located on the outside of the cell membrane with a rigid outside covering.Cell walls give strength to the plant and provide plant cells with structure while limiting flexibility. Cell walls are composed of a type of carbohydrate called cellulose. Cell walls help limit the water being taken in.
Cell membrane helps limit the amount of water being absorbed into the cell. In general, it protects plants from harmful outside influences. Cell walls are composed of cellulose (a polysaccharide) that is located within the cell walls. It is semipermeable, and somewhat permeable to water and lipid substances but not permeable to larger charged substances. Primary means for plants to get water and only causes horm in cases of extreme solute imbalance that can lead to water flowing out of the cells which can cause cell dehydration. The membrane can push up against the cell wall with some force setting up a pressure that keeps more water from coming in.
A central vacuole is an organelle surrounded by a mere coat of cytosol. A central vacuole is capable of taking up more than 90% of cell volume. Central vacuoles are mainly consisted of water. The central vacole contains nutrients water, waste products, and hydrogen ions pumped in to maintain a near-neutral pH level. Central vacuole is the place to store nutrients, retains waste products or degrades them with digestive enzymes.
Plants are green primarily due to the pigment chlorophyll which are located inside chloroplasts. Chloroplasts, the tiny organelles that are the sites of photosynthesis (when sunlight is captured and covert carbon dioxide into food. It is used to make a carbohydrate sugar that functions as the plant’s food source) with nothing but carbon dioxide, water, and a few minerals. As a result, oxygen is left over. Chloroplasts are a special type of plastic. Chloroplasts have special pigments which makes the human eye see green.
The nucleus is the site of the plant cell’s DNA (complete specifications for a protein). The outer boundary of the nucleus is a concentric double membrane called the nuclear envelope. Compounds pass ito and out of the nucleus through nuclear pores. Inside the nucleus it eh nucleolus which specializes in the production of RNA (material that makes up ribosomes).
Processes
Photosynthesis - 6H2O +6CO2 → C6H12O6 +6O2
Photosynthesis consists of two different parts. The Light Reaction which is the photo part. Next is the Calvin Cycle which is the synthesis part. In order for photosynthesis to take place carbon dioxide gas is needed, enzymes to break and rearrange chemical bonds, ATP a molecule that stores and releases chemical energy. NAD+, NADP+ and FADH used to escort electrons and protons around cells to make energy and of course sunlight. Photosynthesis allows for carbon dioxide to come in and oxygen to come out.
In the Light Reaction (photo part) the conversion of solar energy to ATP and NADPH is taken place. The energy emitted from the sun is used to excite chlorophyll, split water into hydrogen and oxygen and store solar energy in ATP and NADPH which is necessary later.
Inside the thylakoid membrane there are stacks of cholorplasts. First the sunlight strikes chlorophyll which gets the electrons excited. The water molecules split apart (H+ and O) consequently the H electrons go to chlorophyll. The oxygen gas is then released from chloroplast. Electrons are then passed around a series of proteins which is referred to as the electron transport chain. Meanwhile, energy is being stored in ATP and NADPH (chemical energy). [2H20 → 4H+ + O2]
On the other hand, the Calvin Cycle (synthesis part) reactions is independent from light. The use of CO2, H+ and energy is combined together to make sugar. Using the energy made in the Light Reactions the hydrogen atoms (H+) from the water split combine with CO2 taken in from stomata to make glucose (C6H12O6). [4H+ + CO2 → CH20(Glucose) = H2O
Consequently, glucose is transported to be available to every cell of the plant to help with flower production, seed production, growth and cell maintenance. Glucose provides both matter and energy to the plant. Matter in terms of carbon, hydrogen, and oxygen that build the cells. Also, energy in the forms of chemical bonds that store energy. ATP is the plant conversion from solar energy into chemical energy.
Cellular Respiration – C6H12O6 +6O2+ ADP → 6CO2 + 6H2O + ATP
C6H12O6 is glucose which stores chemical energy. 6O2 is needed as the final electron accepter.
Products are carbon dioxide and water and energy in the form of ATP. Glycolysis is one of the sole sources of energy transfer. Electron Transport Chain requires the ability to use oxygen. Thus, the products of glycolysis feed into the Krebs cycle and the oxygen-using electron transport chain. All three stages are oxygen dependent. In the absence of oxygen, glycolysis can substitute. The separation between glycolysis and the other two steps takes place in the Krebs cycle and the electron transport chain within cell structures (mitochondria that are immersed in cytosol).
The main function of these phases is the transfer of electrons to the electron carriers. These carries then move to the electron transport chain, where they are themselves oxidized (losing electrons). The movement of these electorns through the chain yields about 32 molecules of ATP.
-The first stage, Glycolysis, means “sugar splitting”. First, the molecule of glucose has to be prepared for energy release. ATP has to be used in two of the first steps of glycolysis so that the relatively stable glucose can be put into the form of a less stable sugar. Then the sugar is split in half. The two molecules formed have three carbons each, once this split has occurred it continues to duplicate.
- The second stage is the Krebs cycle. The Krebs cycle supplies energy bearing electron carriers. It takes place in the inside of the inner membrane (inner compartment). Acetyle CoA combines with oxaloacetic acid (4 carbon). The CoA fragment separates and it results in the energetic citric acid to be oxidized.
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Diffusion – the movement of molecules or ions from a region of their higher concentration to a region of their lower concentration. The natural tendency for any solute is to move down its concentration gradient from higher concentration to lower.
Osmosis- the net movement of water across a semipermeable membrane from an area of lower solute concentration to an area of higher solute concentration. Why? In the case of a solute like salt, water molecules will surround and bond with the sodium and chloride ions as salt separates into a solution. These soluble are not free to pass through the membrane, the water molecules bound to them will be unable to pass through the membrane. The opposite side of the membrane will consist of more “free”water.
Active Transport – Active transport is any time energy that is required for movement across the plasma membrane. The cell’s solution to moving solutes against their concentration is via pumps by expending energy to move substances across the plasma membrane. The energy used often is ATP (adenosine triphosphate), the cell contains electrochemical power of charged ions to move substances across the membrane. One such is called the sodium-potassium pump that allows the cell to maintain an environment of high potassium inside the cell, and high sodium outside the cell. This results ina slow “leakage” of sodium intot he cell as they follow their concentration gradient down and move in through transport proteins while potassium ions are moving out. (page 106)
Reproductive System
Flowers are the reproductive structures of plants. A flower generally has both male and female reproductive structures in it which allows it to fertilize itself. Flowers can be broken down into 4 parts: sepals are the leaf-like structures that protect the flower before it opens (drying out is a problem. The function of the colorful petals is to announce “food here” to pollinating animals. The heart of the flowers’ reproductive structures are the stamens and the carpel. Stamens consist of a long, slender filament that is topped with an anther. Anthers contain cells that will yield sperm-bearing pollen grains. It is these pollen grains that will be released and then carried (via pollinating bee or bird) to the carpel of another plant (or sometimes the same plant). A carpel is a composite structure composed off 3 main parts: the stigma, which is the tip end of the carpel, on which pollen grains are deposited; the style, a slender tube that raises the stigma to such a tall height so that it can easily catch the pollen; and the ovary is the area in which fertilization of the female egg and then development of the next generation of plant will take place. While the angiosperm egg is fertilized and develops into an embryo inside the ovary it becomes enclosed within the seed. While this is taking place the ovary that surrounds the seed is also developing into a tissue called fruit. A fruit is simply the mature ovary of a flowering plant. All angiosperms have fruit in this sense because it is essentially a flowering seed plant whose seeds are enclosed within the tissue called fruit. Fruit becomes ripe because of the gaseous hormone ethylene.
{http://www.school.net.th/library/create-web/10000/science/10000-6575/pic1.jpeg}
http://www.school.net.th/library/create-web/10000/science/10000-6575/pic1.jpeg

Root System
root system. A
A taproot system
A fibrous root system consists of many roots that are all the same size; it has no predominant root. This root system has a large surface area making it effective in gathering nutrients. It also helps to anchor the plant and prevent soil erosion. Both of these systems have a threadlike extension (elongated cells) of their roots called root hairs.
WithinThe vascular bundles consist of the xylem and phloem and run throughout the plant. They carry water to the leaves and carry sugar from photosynthesis throughout the plant.
Within a plant leaf. This open space then creates a type of "suction" that is then the plant. Also at work is the role of adhesion of the water molecules to the sides of the xylem helping with the transpiration stream of water.
The second the phloem. Its primary purpose is in creating pressure flow. Phloem cells the plant.
The vascular bundles consist of When photosynthesis occurs it creates sugar that is then loaded into the xylemphloem, which then transports that sugar to the fruits, stems, and phloem and run throughout the plant.roots when it is stored.
{http://kvhs.nbed.nb.ca/gallant/biology/xylem__phloem.jpg} http://kvhs.nbed.nb.ca/gallant/biology/xylem__phloem.jpg
Environmental System

Environmental System
All plant have chemical substances inside of them that bring about a certain response called hormones. Hormones serve as "chemical messengers" that originate in one part of the pant and then send a message to another part of the plant. There are five major hormones in plants, two of which called auxins and ethylene. Auxins are hormones that promote and regulate growth in the plant. They are also the hormone responsible for phototropism, or the growth of plants toward their light source. Ethylene are hormones that are released by plants as a gas and effect the ripening of fruit and the dropping of leaves of nearby plants. For example, if you were to place an unripe banana in a paper bag with a ripe banana the ethylene gas from the ripe banana would escape and spread to the unripe banana encouraging the production of more ethylene to create ripening. Ethylene initiates the reaction that converts the starches in plants to sugar, also known as the ripening of fruit.
the winter season.season (http://www.wisegeek.com/what-is-photoperiodism.htm). Another response
{phototropism.png}
As the picture shows, the hormone auxin shifts to the dark side of the plant signaling to the cells to elongate themselves on a certain side of the plant. This process causes the bending of the plant toward the light source.
Another process of the plant responding to the environment is called photoperiodism.
a certain direction. direction (http://www.microgravity.ac.uk/subjects/Plantgrav.htm).

Environmental System
All plant have chemical substances inside of them that bring about a certain response called hormones. Hormones serve as "chemical messengers" that originate in one part of the pant and then send a message to another part of the plant. There are five major hormones in plants, two of which called auxins and ethylene. Auxins are hormones that promote and regulate growth in the plant. They are also the hormone responsible for phototropism, or the growth of plants toward their light source. Ethylene are hormones that are released by plants as a gas and effect the ripening of fruit and the dropping of leaves of nearby plants. For example, if you were to place an unripe banana in a paper bag with a ripe banana the ethylene gas from the ripe banana would escape and spread to the unripe banana encouraging the production of more ethylene to create ripening. Ethylene initiates the reaction that converts the starches in plants to sugar, also known as the ripening of fruit.
and night. This process keys the plant on to important knowledge such as the length of day in accordance to the season. It could signal to the plant that it is time to start to produce buds or flowers and conversely if the days are shorter the plant knows to produce seeds for the winter season. Another response
{phototropism.png}
As the picture shows, the hormone auxin shifts to the dark side of the plant signaling to the cells to elongate themselves on a certain side of the plant. This process causes the bending of the plant toward the light source.

Environmental System
All plant have chemical substances inside of them that bring about a certain response called hormones. Hormones serve as "chemical messengers" that originate in one part of the pant and then send a message to another part of the plant. There are five major hormones in plants, two of which called auxins and ethylene. Auxins are hormones that promote and regulate growth in the plant. They are also the hormone responsible for phototropism, or the growth of plants toward their light source. Ethylene are hormones that are released by plants as a gas and effect the ripening of fruit and the dropping of leaves of nearby plants. For example, if you were to place an unripe banana in a paper bag with a ripe banana the ethylene gas from the ripe banana would escape and spread to the unripe banana encouraging the production of more ethylene to create ripening. Ethylene initiates the reaction that converts the starches in plants to sugar, also known as the ripening of fruit.
example is of gravitropismPhotoperiodism which is the ability of plants response to gravity; the fact that the roots desire to grow downin accordance with the lengths of day and the stems want to grow upwards.night. Another response plant.
{phototropism.png} Another
As the picture shows, the hormone auxin shifts to the dark side of the plant signaling to the cells to elongate themselves on a certain side of the plant. This process causes the bending of the plant toward the light source.
Another process of called photoperiodism. Photoperiodism
Another response to the environment occurs through gravitropism which is the ability of plants response to gravity; the fact that the roots desire to grow down and the stems want to grow upwards. Roots have a positive gravitropic response because of they grow downwards. Shoots have a negative gravitropic response because they grow against gravity, upwards. This process is required in accordance withorder for the lengthsplant to survive. Similarly to phototropism, the movement of day and night.the hormone auxin signifies the the plant a need to elongate some cells causing the plant to bend in a certain direction.

Root System
The main purposes of roots are to stabilize the plant in the soil while also absorbing water and nutrients. Each plant has its own root system. These systems include either a taproots system or a fibrous root system. A taproot system can be described as a large central root with numerous smaller lateral roots extending from that (ex: dandelion). This large central root provides a strong anchor for the plant in the soil. Sometimes it is also used for food storage including a buildup of starch and water storage. The smaller, lateral roots serve as the main source to the central root for water and nutrients. Sections of this taproot system can create a new plant.
threadlike extension (elongated cells) of their
Within a plant there are two main vascular tissues: the xylem and the phloem. The xylem is a principal vascular tissue within the plant. It conducts water and helps to dissolves inorganic nutrients. Xylem cells are stacked together to form a pipeline/tube throughout the plant from the root to the tips of all the leaves. The xylem is also involved in a process known as transpiration, serving as a tube to carry the water up the plant out the stomata. The basis of this process results once the water has evaporated from the plant and there is open space within the leaf. This open space is then filled by more water until it reaches the xylem. Once the water has reached the xylem the process of cohesion of hydrogen bonds between water molecules allows water to be transported, against gravity, up the plant.
The second main vascular tissue is called the phloem. Phloem cells are laid out end to end in the plant to create a tube that transfers the product of photosynthesis (glucose or sugar) throughout the plant.
{http://kvhs.nbed.nb.ca/gallant/biology/xylem__phloem.jpg} http://kvhs.nbed.nb.ca/gallant/biology/xylem__phloem.jpg
Environmental System
called hormones. Hormones serve as "chemical messengers" that originate in one part of the pant and then send a message to another part of the plant. There are which called auzinsauxins and ethylene. the plant. They are also the hormone responsible for phototropism, or the growth of plants toward their light source. Ethylene are nearby plants. For example, if you were to place an unripe banana in a paper bag with a ripe banana the ethylene gas from the ripe banana would escape and spread to the unripe banana encouraging the production of more ethylene to create ripening. Ethylene initiates the reaction that converts the starches in plants to sugar, also known as the ripening of fruit.
Environmental factors to sunlight. PhototopismPhototropism is the the plant. Another
{phototropism.png} Another process of