1. Tissue___

2. Organ ___

3. System ___

A. Group of organs working together to perform specialized tasks.

C. Groups of tissues organized into a structural and functional unit.

B. Group of similar cell that work together to carry out the same function.

C

B

A

A

B

CD

a) Organ

b) Tissue

c) System

• The LEAF is an example of a/an

• The leaf is a collection of tissues whose main purpose is to carry out or support the process of photosynthesis. There are special organelles responsible for this. What are the organelles called?CHLOROPLASTS

**Anything this colour, do NOT copy. It’s just for review or interest! Click on the word Photosynthesis, above, and go to “Illuminating Photosynthesis.” Explore the interactive video.

• PHOTOSYNTHESIS is defined as the synthesis of chemical compounds with the aid of radiant energy and especially light.– Photo means light– Synthesis means to make

• It is a chemical reaction performed during the day by producers only.

• It takes place in an organelle unique to plants, called the CHLOROPLAST.

Nature of light

• Wavelength • Electromagnetic spectrum• 380 to 750 nm (visible light)• photon

• Chlorophyll a & b

• accessory pigments– E.g.: carotenoids

& xanthophylls

Photopigments

  Interactions of light with chloroplast

Can you identify the different organelles in the cell below?

• Chloroplasts contain the green pigment, CHLOROPHYLL.

• The chlorophyll, found in the thylakoids of the chloroplast, absorbs light energy and stores it as chemical energy in glucose.

• CELLULAR RESPIRATION is a reaction performed both day and night by both producers and consumers

• It is the process by which plants and animals convert the stored energy in their food (glucose) to usable energy to carry out cellular functions.

6 12 6( ) 2( ) 2( ) 2 ( )6 6 6s g g lC H O O CO H O energy

• Cellular Respiration begins in the cytoplasm but ends in the mitochondria

• What is the word equation for cellular respiration?

Gas Production

• Photosynthesis produces O2(g)

• Cellular respiration produces CO2(g)

• Photosynthesis may only occur in the presence of light, so it must happen during the day.

• Cellular respiration may occur at all times.

1. Photosynthesis requires:

-chlorophyll

-sunlight – what colour of light will not work?

-water

-CO2

2. Photosynthesis produces:

-O2 (oxygen gas)

-C6H1206 (glucose)

3. Online Quiz

Read pp. 303-308C&R pg 308 #1-5, 7, 8