1. To be successful today…
Parent reflection due WED 11/15
Add to TOC and set up Notes: Plant Structures
HW: Job for Life WS
BYOD Color of the day is Phones are in put away in backpacks

2. Plant Structures
Essential Question: How do the major structures contribute to the plant’s survival and overall life functions?

3. Recall…the levels of biological organization

4. Characteristics of Plants
Eukaryotic
Multicellular
Autotrophs
Cell walls made of cellulose

5. Importance of plants Earth’s major producers
Provide food and shelter for many organisms
Supply oxygen needed for respiration
Take in CO2 and release O2

6. Major structures of land-living plants

7. 1) Leaves Broad, flat organ that traps light energy
Cells contain 1000s of chloroplasts (photosynthesis)
Location for most photosynthesis in plants

8. Cross section of the leaf

9. Cuticle Protective waxy layer on leaves
Prevents evaporation & tissues from drying out

10. Stomata Small pores in the cuticle of the leaf
Regulated by guard cells - allow for gas exchange during photosynthesis
Can close to prevent water loss – transpiration
Stomata & guard cells

11. Types of Leaves The leaf of the pitcher plant is modified to attract &
then digest insects & other small
prey due to lack of nitrogen.
Cactus leaves are actually nonphotosynthetic
Thorns that protect against herbivores.

12. The narrow leaves of a pine tree contain a waxy epidermis
as well as stomata shrunken below
the surface of leaf to reduce
water loss.
The leaves of a rock plant are adapted for hot, dry conditions. They are round, with few stomata, and often have clear tissue that allows light to penetrate into the leaf.

13. 2) Roots Plant organ that: Anchors plant in ground
Absorbs water & minerals from soil (assisted by root hairs)
Transports nutrients to stem

15. 3) Stem Provides support for upright growth
Some green stems may also carry out photosynthesis
Contains vascular tissues for transporting nutrients from one part of the plant to another

16. Two types of vascular tissues: xylem & phloem

17. Sugar/food moves from leaves to roots
Phloem:
Sugar/food moves from leaves to roots
Xylem: Water moves from roots to leaves

18. Types of Stems A tuber is a stem, usually growing underground,
that stores food. Ex. potato
A rhizome is a horizontal,
underground stem. New
shoots can form allowing
the plant to undergo
periods of dormancy. Ex. ginger

19. central stem surrounded by short, thick leaves. that protect the bulb
A bulb is made up of a
central stem surrounded
by short, thick leaves.
that protect the bulb
& store food. Ex. Onion, garlic

20. 4. Flowers ~ structures that aid in reproduction