these plants are called xylem and phloem. The xylem of vascular plants consists of dead cells placed end to end that form tunnels through which water and minerals move upward from the roots (where they are taken in) to the rest of the plant. Phloem‚ which is made up of living cells‚ carries the products of photosynthesis (organic nutrients) from the leaves to the other parts. The vascular system is continuous throughout the whole plant‚ even though the xylem and phloem are often arranged differently
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Why did plants exposed to no light grow better than the plants exposed to light? The plants exposed to no light performed better than those exposed to light is most likely caused by the plants exposed to no light having more water than those in light. Even though the amount and frequency of water added to all plants were kept the same‚ the amount of water the plants in no light had access to was more than the amount of water the plants in light had. This is due to two reasons: a) because the plants
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The phloem consists of living cells arranged end to end. Unlike xylem‚ phloem vessels contain cytoplasm‚ and this goes through holes from one cell to the next. Phloem transports sucrose and amino acids up and down the plant. This is called translocation. In general‚ this happens between where these substances are made and where they are
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Gaseous exchange and transport Movement of chemicals in plants and animals -Chemicals that are being moved into the body‚ within the body or out of the body are gases‚ this movement is known as gaseous exchange. -The gases being moved in our out of the body need to move across the surface area of the body‚ in most cases a special surface area has been developed. -The surface that the gases cross is called the respiratory surface and the gases move across this surface by the process of diffusion
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by sieve tubes and sieve cells of vascular tissue known as phloem. (4) Besides the carbohydrates‚ the phloem transports amino acids‚ several plant hormones which are synthesized at the shoot and root tips and other substance (5) The translocation takes place in both‚ upward and downward directions. (6) Translocation of substances requires energy which is obtained from ATP. (7) When the material like sucrose is transferred into phloem tissue‚the osmotic pressure of tissue increases leading to
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hat are Plants and How did they Evolve: Plants are multicellular‚ photosynthetic organisms‚ adapted primarily for life on land. With a combination of both‚ underground and aboveground structures‚ plants have the ability to absorb water and mineral nutrients from soil while food production is also occurring through the process of photosynthesis. Scientists assume that plants where the cause of evolution‚ adapting from aquatic green algae 500 million years ago. Many essential adaptations would have
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DNA- is the material found in the nucleus that contains the genetic info. 4 billion codes in length Gene- a segment of DNA that controls a certain protein production. A gene is made up of hundreds to thousands of codes. Chromosomes- genetic material that is coiled up into structures during cell division. Importance of DNA- genes control the production of proteins..(look like‚ body function‚ body communications‚ and enzyme control) DNA screening- the process of testing individuals to determine
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additional support | Vascular bundle | contains xylem‚ phloem and cambium tissue | Xylem | a longitudinal set of tubes that conduct water from the roots upward through the stem to the leaves | Phloem (sieve elements) | transports sap through the plant tissue in a number of possible directions | Vascular cambium | is a type of lateral meristem that forms a vertical cylinder in the stem. The cambium produces the secondary xylem and phloem through cell division in the vertical plane | In the
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Plant Transport Plants are mostly made up of water. Lettuce is about 94% water and a potato is about 77% water. Plants need water for three main purposes: ------photosynthesis‚ -support -transport of chemicals Water is a raw material for photosynthesis. If water is in short supply‚ the rate of photosynthesis will be limited. Plants need water for support‚ otherwise they wilt. Water is needed to transport many chemicals within plants. Chemicals‚ such as mineral salts‚ dissolve in water and
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Arrangement of Vascular Tissues in Flowering Plants • Xylem and phloem often are grouped together -> vascular bundle • Cambium -> lies in between xylem and phloem -> divide and differentiate -> form new xylem and phloem tissues -> thickening of stem Movement of Substances Into and Within Flowering Plants Entry of Water and Nutrients into Plants • Absorption of water -> root hairs -> grow into close contact with liquid around them • Thin film of liquid surrounding soil
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