1. Happy Wednesday, BIO-NINJAS
What you need: Writing Utensil, Highlighter and Journal
Bellwork: On left page of most recent notes.
What cycle is depicted in the image above?
How do you know?
Describe the steps that are occurring at stage A, B, C, D and E.

2. Due this week…
Pre-AP: Virus Project due today for a 50 (tomorrow is a 0)
Test Analysis Due by Friday or the incomplete grade stays
Note Cards are Due By Friday
Word, Definition, Picture w/color

3. Required Homework tonight
“Plant System Interactions” by: Alyssa Dolny
On my website
Alyssa Dolny’s youtube channel.
Remind 101 will be sent out later today with a direct link.
Cornell Notes! Highlight, summary and higher level questions!

4. Celery Demo…

5. Set up the next page in your journal…
Title: Plant Systems: Response and Transport
Essential Question: How do systems interact to help plants respond to their environment?
Cornell notes!

6. Individual parts interact to make a system.
There are many parts involved in making something work! In this unit, we will focus on the parts and systems involved in making plants work:
4 Main Plant systems…
Response system
Hormones are used to help plants respond to the environment
Support - roots help keep plant in place while stem provides strength and supports other organs
Transport
Vascular Tissue in stem and leaves is used to help water and other substances move in and out of plant
Reproduction
Reproductive organs/gametes are used to help plants make more plants
Individual parts interact to make a system.
Different systems interact to help a plant maintain homeostasis (balance).

7. The RESPONSE System. A plant’s RESPONSE system is made up of HORMONES.
Each hormone (chemicals inside the plant’s body) causes a specific reaction in response to something in the environment.
These reactions are called TROPISMS.
(can be a positive or negative response)
Positive Tropism: the plant reacts toward the stimulus
Negative Tropism: the plant reacts away from the stimulus

8. Gravitropism
Hydrotropism
Thigmotropism
Phototropism

9. Phototropism (Response to Light)

10. Gravitropism (Response to Gravity)

11. Thigmotropism (Response to Touch)

12. Hydrotropism (Response to Water)

13. How does the response system (tropisms) work with the support system?
*Left hand side

14. Absorb water and minerals from the soil
Roots
Hold plant in position
Absorb water and minerals from the soil
Cells are specialized for water intake

15. Wheat seed
Root hairs
Fragile parts of cells that grow from the main root
They massively increase the surface area for absorption

16. Root hair cells (x150)

17. Stems:
structure that supports the plant and it’s organs connects and carries water and nutrients between the roots and leaves

18. How does the support system work with the transport system?

19. TRANSPORT….

20. Vascular tissue: specialized tissue (tubes) used to move water and nutrients throughout a plant.
*like veins and arteries

22. Xylem: tubes that carry water upward from the roots to every part of the plant. Phloem: tubes that transport food from the leaf downward to the rest of the plant *(nutrients) produced by photosynthesis.

23. What purpose does a leaf serve?

24. Leaves: organs that perform photosynthesis and contain one or more bundles of vascular tissue.

25. Cuticle: a thick waxy layer on the top of the leaf that protects the leaf against water loss and injury.
LIPID

26. Transports water and sugar to stem and roots
Conserves water
Photosynthesis
Transports water and sugar to stem and roots
Structures of the Leaf

27. Leaf diagram – palisade layer
Most chlorophyll
CO2

28. Stomata: openings in the underside of the leaf Allow carbon dioxide and oxygen to diffuse (move) into and out of the leaf. Guard cells: specialized cells that control the opening and closing of stomata.

29. Transpiration is the loss of water through leaves
Transpiration is the loss of water through leaves. *the stomata regulate this process

30. Osmotic pressure keeps a plant’s leaves and stems rigid
Osmotic pressure keeps a plant’s leaves and stems rigid. Wilting results from the lack of water—and therefore of the pressure in a plant’s cells.

31. Stoma position

32. Stoma is a small hole Its size is controlled by 2 guard cells closed
open

33. Stoma function is for gas exchange in the leaf
oxygen
Guard cell
Provided plant is photosynthesising
Carbon dioxide

35. Why would a plant open and close its stomata?

36. Stomata open and close at different times of the day
When it is light the plant needs CO2 for photosynthesis so the stoma open
At night (darkness) they close to conserve water

37. Gas exchange

38. Mix-Freeze-Group 2 3 4 5 Guard Cell Phloem Xylem Transpiration
I am the vascular tissue that transports nutrients through the plant.
I am the structure around the stomata that allows gases to enter and exit the leaf.
I am the process during which water is lost through the leaves.
I am the vascular tissue that transports water throughout the plant.