Unformatted text preview: Chapter
8.1 and 3.2 Energy and Life
The capacity to do work. Production and use of energy.
A.) Autotrophs- Organisms that can capture
energy from sunlight or chemicals and
produce food from inorganic compounds.
B.) Heterotrophs- obtain energy from food
(AKA Consumers) How do autotrophs make food?
-Make glucose a little ATP+NADPH for the plant.
Takes place in the chloroplast Why heterotrophs obtain energy?
ATP Is the molecule Organisms produce to
perform functions such as muscle
contraction, active transport, metabolism,
and every bodily function. What makes ATP so important?
● It’s the only form of chemical energy organisms can use.
It’s like cellular money. How does ATP work?
● PHOSPHATE GROUPS ARE
ALL NEGATIVELY CHARGED.
2 negatives repel each other
There is a small amount of ATP
in each cell and is reused very
quickly How do organisms produce ATP
ATP is made by harvesting energy from glucose, proteins, and fatty acids made by
plants and animals.
Through cellular respiration all organisms make ATP…….. EVEN PLANTS!
Photosynthesis makes glucose and that’s the energy we get from plants and use
that energy to make ATP. End of notes check up
1.) Plants and animals use what molecule to store energy just
before its used?
2.) What is the difference between a heterotroph and an
3.) What organisms use cellular respiration?
4.) What is food for plants? 3.2 energy flow Autotrophs- What kind are there?
1.)Organisms that make their own food.
a.)Photosynthetic- Uses energy from sunlight to make
energy rich molecules
b.)Chemosynthetic- Use energy from inorganic molecule
to make energy rich molecules What are the 3 types of heterotrophs 1.)Heterotrophs types
a.)Carnivore- Eat animals
b.)Omnivore- Eat plants and animals
c.)Herbivore- Eat plants What is energy flow? -Energy flows through a food chain.
-Some goes to the next trophic
level,some to heat. Energy moves in one direction(to the next trophic
level) A food web is just multiple food chains connected ECOLOGICAL PYRAMID Only 10% makes it to the next level
(Biomass, energy, orgaism numbers ) How does energy move?
-Population numbers Some goes to the next trophic level some goes to heat TROPHIC LEVELS
Trophic level :Step in a food chain ...
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- Fall '16
- David Miller