2.  Why are plants important?

4.  1.Leaves- produce food used by plant & stored for later use by plant or animal

5.  Vary in shape & size  Identify plant  Arrangement differs  Some alternate  Some opposite  Some whorled

6.  Petiole- leaf stalk  Blade- flat part of the leaf

7.  Veins- structural framework  Different margins- assist in plant ID

8.  Specialized cells that perform important functions  Skin of leaf- epidermis  Single layer of cells to protect leaf from loss of moisture

9.  Guard cells- open & close pores (stoma) to allow leaf to breathe & transpire & exchange gases

10.  2. Stems- 2 functions  Movement of materials  Support of leaves and reproductive structures

11.  Lenticels (breathing pores) on outside  Bud scale scars  Where a terminal bud located.  Distance between equals 1 yr of growth

12.  Leaf Scars  Where leaves were attached

13.  Water & mineral travel up xylem  Manufactured food travels down phloem

14.  Dicots- xylem & phloem form 2 layers separated by cambium (produces cells)  Cambium builds new phloem cells on outside & new cells inside (grows)  EX: Trees

15.  Dicot  Sapwood- new active xylem  Heartwood- old, inactive phloem

17.  Monocots- vascular bundles contain xylem & phloem  No cambium  All cells formed at initial stage of stem growth & enlarge  Limited in size

19.  3. roots  anchor the plant and hold it upright  Absorb water and minerals from the soil and conduct them to the stem

20.  Roots

21.  Stem  Older roots of shrubs have phloem outside, cambium layer & xylem inside

22.  Very different from stem  Roots have root cap- many hairs behind.  Side roots of increasing size form as root grows older

23.  Root cap produces a continuous supply of new cells that rub off to lubricate a path & protect cap through soil

24.  Root hairs absorb moisture & minerals conducted to the larger roots & stem of plant

26.  4. Flowers

27.  10 minutes  Compare & contrast the difference between fibrous root systems and tap root systems.

28.  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.

30.  What are the 4 main parts of a plant?

31.  What are the parts of the flower?

32.  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.

33.  Sepals- green leaf-like parts of the flower that cover and protect the flower. Form the calyx after the flower is open.

34.  Petals- actually leaves. Colors attract insects for pollination.

35.  Stamens- Male reproductive part of the flower.  Filament- short stalk  Anther- saclike structure, contains pollen, the male sex cell.

37.  Pistil- Produces the female sex cells- the eggs. If fertilized, these eggs become seeds.

38.  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.

39.  Pistil

41. AHS Agriculture

42.  What are the parts of a flower?

43.  How do the plant processes work?

44.  Evaporation of water through plant leaves & stems  When water not available, slows down or stops

45.  Drought- stomata close & photosynthesis slows/stops  No water/carbon dioxide  Necessary for plant survival  Cools plant

46.  Maintains flow of nutrients & food from root to top  Guttation- when soil too moist, plants force water from leaf vein tips to reduce pressure

48.  Process by which carbon dioxide & water converted to sugar & oxygen in the presence of light  Choloroplasts- food making cells in plant

49.  Chlorophyll- gives green color  Plants beginning of food chain  Oxygen used by animals & all forms of oxidation

50.  Food manufactured in leaves  Moves toward stem to roorts  Used or stored in form of starch, protein or sugar

51.  Carbon dioxide enters through stoma  Good growing conditions maximize photosynthesis

53.  Consume oxygen & give off carbon dioxide  Adequate supply of oxygen needed to all parts of plant  Produce more oxygen in photosynthesis then use- released

56.  Study for test.