Leaves Vary in shape & size Identify plant Arrangement differsSome alternateSome oppositeSome whorled
Internal Leaf Structure Specialized cells that perform important functions
Skin of leaf- epidermisSingle layer of cells to protect leaf from loss of moisture
Internal Leaf Structure Guard cells- open & close pores (stoma) to allow leaf to breathe & transpire & exchange gases
External Stem Structure Lenticels (breathing pores) on outside
Bud scale scarsWhere a terminal bud located.
Distance between equals 1 yr of growth
Internal Stem Structure Dicots- xylem & phloem form 2 layers separated by cambium (produces cells)
Cambium builds new phloem cells on outside & new cells inside (grows)
EX: Trees
Internal Stem Structure Monocots- vascular bundles contain xylem & phloem
No cambium All cells formed at initial stage of stem growth & enlarge
Limited in size
3. rootsanchor the plant and hold it upright
Absorb water and minerals from the soil and conduct them to the stem
Internal Root Structure Stem Older roots of shrubs have phloem outside, cambium layer & xylem inside
External Root Structure Very different from stem
Roots have root cap- many hairs behind.
Side roots of increasing size form as root grows older
External Root Structure Root cap produces a continuous supply of new cells that rub off to lubricate a path & protect cap through soil
External Root Structure Root hairs absorb moisture & minerals conducted to the larger roots & stem of plant
Assignment 10 minutes Compare & contrast the difference between fibrous root systems and tap root systems.
Assignment Obtain a piece of a plant Observe the 3 parts we just learned about and label what you can see.
I will come around and check
30 minutes.
Beauty of flower- attract insects that pollinate to begin fruit and seed formation.
Fruit and seeds- collected, eaten, and spread.
continued existence of the plant itself.
Sepals- green leaf-like parts of the flower that cover and protect the flower. Form the calyx after the flower is open.
Stamens- Male reproductive part of the flower. Filament- short stalkAnther- saclike structure, contains pollen, the male sex cell.
Pistil 3 parts-Stigma- sticky top to catch pollen
Style- tube that leads to the third part
Ovary- egg that becomes a fruit or seed coat.
Transpiration Evaporation of water through plant leaves & stems
When water not available, slows down or stops
Transpiration Drought- stomata close & photosynthesis slows/stopsNo water/carbon dioxide
Necessary for plant survival
Cools plant
Transpiration Maintains flow of nutrients & food from root to top
Guttation- when soil too moist, plants force water from leaf vein tips to reduce pressure
Photosynthesis Process by which carbon dioxide & water converted to sugar & oxygen in the presence of light
Choloroplasts- food making cells in plant
Photosynthesis Chlorophyll- gives green color
Plants beginning of food chain
Oxygen used by animals & all forms of oxidation
Photosynthesis Food manufactured in leaves
Moves toward stem to roorts
Used or stored in form of starch, protein or sugar
Respiration Consume oxygen & give off carbon dioxide
Adequate supply of oxygen needed to all parts of plant
Produce more oxygen in photosynthesis then use- released