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Bio B12 Flashcards

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13520139372Multicellular organismsSmall cells, many groups, different sizes0
13520139373unicellular organismLarger cells, survive in wider range of environments, need coordination to have organized function1
13520139374stem cellsNo specialized function, divide into new cells and either stay as stem cell or become a cell with specialized function2
13520139375PhotosynthesisConversion of light energy from the sun into chemical energy.3
13520139376cellular respirationProcess that releases energy by breaking down glucose and other food molecules in the presence of oxygen4
13520139377CuticleWach clear layer that prevents evaporation in the leaf5
13520139378upper epidermisthe part of the leaf above the palisades layer that prevents the loss of water and is protective layer6
13520139379Palisade tissue cellscolumn-shaped mesophyll cells in a plant leaf; responsible for photosynthesis and has lots of chloroplasts7
13520139380Spongy tissue cellsphotosynthetic plant cells that are loosely packed to enable gas exchange, located below the palisade tissue cells in a leaf8
13520139381xylem and phloemtwo types of vascular tissue9
13520139382Xylemcarries water and minerals from roots to leaves10
13520139383PhloemLiving vascular tissue that carries sugar and organic substances throughout a plant11
13520139384lower epidermisprotective layer on the bottom of leaf which contains stomata & guard cells12
13520139385StomataSmall openings on the underside of a leaf through which oxygen and carbon dioxide can move13
13520139386vascular bundlea unit strand of the vascular system in stems and leaves of higher plants consisting essentially of xylem and phloem14
13520139387VeinsTransport system is spongy tissue cells in mesophyll15
13520139388Gas exchangeHappens in leaves, leaves are most important, spongy tissues cells and stomata16
13520139389What happens to plants during gas exchangeTranspiration (guard cells and stomata keep the lead from losing too much water)17
13520139390Transpirationloss of water from a plant through its leaves18
13520139391turgor pressurewater pressure within a plant cell19
13520139392What happens during osmosisGuard cells take in water, increase is turgor pressure and stomata opens20
13520139393What happens during transpirationGuard cells lose water, decrease in turgor pressure, stomata closes21
13520139394LenticelsA small raised area in the bark of stems and roots that enables gas exchange between living cells and the outside air.22
13520139395What happens to the stomata with lightIt opens23
13520139396What happens to the stomata with no lightIt closes24
13520139397What are the functions of the xylem- transport water and dissolved minerals - provides mechanical strength/support for the plant. It is made of dead cells that form a tube, without a xylem photosynthesis wouldn't happen25
13520139398Water Uptake (Xylem)Water enters plants through epidermal layer of root hairs, diffuses by osmosis, (mineral transport is active)26
13520139399xylem sapthe water and dissolved minerals in the xylem27
13520139400What are the functions of the phloemLiving cells, cell wall contains pores to exchange materials, transports sugars through plant28
13520139401What are the 4 things that help sap travel up the stemCohesive forces, adhesive forces, root pressure, transpiration29
13520139402cohesive forcesAttractive forces between water molecules30
13520139403adhesive forcesAttractive forces between water molecules and surface molecules31
13520139404root pressureTurgor pressure inside the root xylem32
13520139405TranspirationEvaporation of water from the leaves of a plant and forces water up to replace evaporation33
13520139406Sugar uptake (phloem)Sugars (phloem sap), produced during photosynthesis transported through plant via photosynthesis. Sugar concentration through cell. Water moves into cell through osmosis, turgor pressure increases and forces sugar out of phloem to neighbouring cells34
13520139407phloem sapa mixture of sugar, nutrients, and water that flows through phloem vessels in a plant35
13520139408Tropisma plant's response to its environment36
13520139409PhototropismA growth response to light37
13520139410AuxinsPlant hormones that lead to phototropism by elongating the dark side of the plant38
13520139411GravitropismA growth response to gravity39
13520139412negative gravitropismgrowth of the plant stem upward, away from the earth40
13520139413positive gravitropismgrowth of the roots downward, toward the earth41
13520139414nastic responseResponse to touch (Venus fly trap)42
13520139415sleep movementsChanges in the position of plant leaves throughout the course of a day, following the movement of the sun. Day leaves are high and full. Nighttime they drop. Controlled by turgor pressure43

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