1. Lab unit 18 Focus on Angiosperms
Plant Structure
Lab unit 18
Focus on Angiosperms

2. Vegetative Organs of the Flowering Plant Body
Flowering plants possess three kinds of vegetative (nonreproductive) organs: roots, stems, and leaves.

3. Most angiosperms belong to one of two major clades . Moncots Eudicots
Flowering plants
Most angiosperms belong to one of two major clades .
Moncots
Eudicots

4. Figure 35.1 Monocots versus Eudicots

5. Roots, Shoots, and Leaves

6. Roots Anchor the plant in soil Absorb water and minerals from soil
Stores products of photosynthesis

7. There are two main types of root systems
1.Taproot system (a) Carrots
A single, large, deep-growing primary root with smaller lateral roots.

8. 2.Fibrous root system (b) Grass
Numerous thin roots roughly equal in diameter.
Holds soil in place very effectively

9. Vegetative Organs of the Flowering Plant Body -stems
Shoots
Steams- support
Leaves -food

10. A node
not a discrete structure, but rather that portion of a stem from which one or more leaves arise

11. Vegetative Organs of the Flowering Plant Body
Embryonic shoot
A bud
produces the cells for the growth and development of that stem, branch, or leaf
*Terminal or apical bud at tip of each stem or branch.

12. Some stems are highly modified
A potato is a portion of the plant’s stem, and its “eyes” contain lateral buds.
The runners of strawberries
are horizontal stems.

13. Vegetative Organs of the Flowering Plant Body
Leaves
The organ that produces food for the plant –photosynthesis.
Well adapted for gathering light.

14. Vegetative Organs of the Flowering Plant Body
Leaves
The blade of a leaf is attached to the stem by the petiole

15. Vegetative Organs of the Flowering Plant Body
Leaf Anatomy Cuticle Vascular tissue: Xylem Phloem

16. Leaf Diversity

17. Leaf diversity for us  A simple leaf has a single blade. (A)
The Diversity of Leaf Forms
Leaf diversity for us 
A simple leaf has a single blade.
A compound leaf has multiple blades (or leaflets) arranged along an axis or radiating from a central point.
(A)

18. Unit 33
Symbiosis is close and often long-term interactions between different biological species.
Three types:

19. Parasitism a relationship is one in which one member of the association benefits while the other is harmed

20. Mutualism is any relationship between individuals of different species where both individuals derive a benefit

21. Commensalism describes a relationship between two living organisms where one benefits and the other is not significantly harmed or helped
Commensalism is difficult to demonstrate, for true commensalism, the second species must be unaffected by the presence of the first
Commensalism describes a relationship between two living organisms where one benefits and the other is not significantly harmed or helped