Photosynthesis Organisms make food using light energy

many kinds of organisms carry out photosynthesis Blue-green algae bacteria Multicellular plants

Plants provide food for animals, and us, too

Photosynthesis Needs co 2 & h 2 o Needs light energy Makes sugar Makes o 2 leaf

Photosynthesis equation 6CO 2 + 6H 2 O C 6 H 12 O 6 + 6O 2 Complex carbohydrates, proteins, fats, amino acids, enzymes, coenzymes, pigments

Light Energy – The the part we can see and the plants use!

PLANT PIGMENTS ABSORB CERTAIN WAVELENGTHS OF THE VISIBLE SPECTRUM (SUNLIGHT) Chlorophyll a Chlorophyll b phycoerythrin phycocyanin Beta-carotene

Plants are green because they reflect the green wavelengths and absorb (and use) the others. Your favorite blue shirt is blue because it reflects blue wavelengths and absorbs the other wavelengths …. Plants reflect green wavelengths.

The leaf is the primary photosynthetic organ of the plant

Leaves take in CO 2 while roots take in H 2 O

Chloroplasts are found in the cells of the leaf and other photosynthetic parts of the plant

Green plant cells contain chloroplasts

Photosynthesis occurs all day Photosynthesis occurs as long as light is available

Photosynthesis and respiration are interdependent upon each other – plants carry out both processes

goodnight

All organisms need energy

Why do we need energy? To Grow To Move To Reproduce ETC.

Respiration provides energy from food

Aerobic respiration requires oxygen Anaerobic respiration does not require oxygen

C 6 H 12 O 6 + 6O 2 6CO 2 + 6H 2 O + ATP Glucose + oxygen carbon dioxide + water + ATP Respiration occurs in the Mitochondria of Cells Aerobic Respiration Equation

Aerobic Respiration has three major steps 1  2  3  ATP

Respiration provides Energy from food so we can:

The end