Download presentation
Presentation is loading. Please wait.
2
Are you a producer or a consumer?
3
Autotroph: An organism that is capable of making its own food (Producer)
Heterotroph: An organism that must obtain food and energy from other sources. Otherwise, they have to EAT!! (Consumer)
4
The Green World’s Gift:
Photosynthesis
5
Photosynthesis and Energy
1. Try to name something you eat that isn’t from a plant or from an animal that ate a plant. 2. All food comes from plants. Molecules of our bodies are made from food we eat, but plants make their own food from sunlight. Food is used for: a) Creating macromolecules from monomers like glucose and amino acids.
6
b) More importantly, food is used in respiration to generate cellular energy, ATP. Plants are the universal source of energy for all living things.
7
Photosynthesis in Nature
The process by which plants make their own food Transforms solar energy into chemical energy. CO2 and H2O into Glucose (a simple sugar) CO2 is the carbon source and light is the energy source.
8
6 CO2 + 6 H2O + energy C6H12O6 + 6 O2
9
Raw Materials of Photosynthesis
CO2 H2O energy
10
Products of Photosynthesis
Glucose Oxygen
11
4. Photosynthesis driven by only part of the visible spectrum (blue and red); plant pigments in the green plant reflects green and absorbs blue and red.
12
The substance in green plants that capture the sun’s light is the green pigment chlorophyll (found in chloroplasts, an organelle only found in plant cells)
13
Tour of a leaf, where plants absorb light:
1. Blade Leaf section, epidermis, stomata, mesophyll Chloroplasts, inner and outer membranes 4. Grana and stroma Thylakoid membrane, and compartment 6. Pigments
14
Stomates: openings in the leaf
15
Leaf cross section
17
for respiration is produced as a by-product of photosynthesis.
Oxygen needed for respiration is produced as a by-product of photosynthesis.
18
Cellular Respiration Any metabolic pathway used by living organisms to break down organic molecules and extract energy In other words, changing food into energy.
19
The organic molecule that is being broken down is Glucose
20
Two categories of cellular respiration
Aerobic Cellular Respiration Anaerobic Cellular Respiration
21
Aerobic Cellular Respiration – cellular respiration that requires oxygen, O2
C6H12O6 + 6O2 + ADP 6CO2 + 6H2O + ATP
22
Anaerobic Cellular Respiration
Does not require oxygen Produces less energy than aerobic respiration Produces lactic acid or ethyl alcohol e.g. Lactic Acid Fermentation, Alcoholic fermentation
23
Where does it happen? Respiration takes place both in plant and animal cells in an organelle called the mitochondria.
25
Raw Materials of Respiration
Glucose Oxygen
26
Products of Respiration
Carbon Dioxide Water Energy
27
Answer these questions:
Has a pattern emerged? How are photosynthesis and respiration dependent on one another? Give 3 examples of autotrophs and heterotrophs
Similar presentations
© 2025 SlidePlayer.com. Inc.
All rights reserved.