AIM: How do organisms maintain dynamic
equilibrium that sustains life?
4/19/13
DO NOW:
1. Pick up today’s quiz &
finish it
HOMEWORK:
1. Study for Monday’s
Preliminary ILS Exam #1
Identify the structure & function of the labeled parts of
the plant below.
A – Flower – Reproduction
in the plant
B – Leaves – Site of
photosynthesis (makes food for
the plant)
C – Stem – Transports
materials throughout the
plant
D – Roots – Takes in water
Explain the function of the three parts of the seed.
Seed Coat – Protects the
developing embryo
Embryo – The developing
baby plant
Cotyledon – Stored food for
the embryo & young seedling
Why does the seedling at right need
the cotyledon after germination?
The Cotyledon provides the
seedling with food until its leaves
can fully function & photosynthesis
can take place
What do all organisms need to stay
alive?
 Energy from food
How do plants make their food?
 Photosynthesis
Where does photosynthesis occur in
a plant?
 Chloroplasts
What is needed for photosynthesis
to occur?
 Carbon dioxide, water, and sunlight
What is the formula for
photosynthesis?
CO2 + H2O + Sunlight
Glucose + O2 + H2O
ILS Question
The flowchart below represents the process of photosynthesis.
One step in the process is labeled X.
Which activity occurs at X?
Carbon dioxide and water are used to make sugar
Where does photosynthesis take place?
Chloroplasts
ILS Question
Base your answers to questions 1
and 2 on the diagram to the right
and on your knowledge of science.
The diagram shows a plant that
carries out photosynthesis.
1. Sunlight is absorbed by the
leaves. What two substances
are also taken in by the plant
for photosynthesis to occur?
2. Identify one product, other
than sugar, that results from
the process of photosynthesis.
What is cellular respiration?
 The chemical process that cells
use to release energy from food
molecules
Where does cellular respiration
occur inside of the cell?
 Mitochondria
What is the formula for cellular
respiration?
O2 + Food + H2O
Energy + CO2 + H2O
What are the waste
products of cellular
respiration?
 Carbon dioxide
 Water
How are these waste
products of respiration
removed from our body?
 Exhale (CO2 & H2O)
 Sweating (H2O)
 Urine (H2O)
ILS Question
The diagram below shows a life process taking place
within a cell.
What life process is shown?
Where does this life process take place within the cell?
Describe what is occurring in the diagram below
Explain the difference
between a producer & a
consumer?
 Producer – make their
own food
 Consumer – must obtain
food from the
environment
Give an example of a
producer. Consumer.
ILS Question
Producers, consumers, and decomposers are three types
of organisms that obtain nutrients in different ways.
In the chart below, identify each organism as a producer,
consumer, or decomposer based on its source of nutrients.
ILS Question
1. Identify the living and
nonliving parts of the
fish tank ecosystem.
2. Identify the producers &
consumers in the fish
tank.
3. How are the living
organisms in the fish
tank interdependent on
each other for survival?
Identify the 4 types of
consumers.
 Herbivores – eats plants
 Omnivore – eats both plant &
animals
 Carnivores – eats animals
 Decomposers – eats long dead
organisms (decompose wastes)
ILS Question
The diagram below shows a food chain.
1. Identify the herbivore in the diagram above.
2. Identify the carnivores in the diagram above.
What is metabolism?
 All of the chemical activities in
an organism’s body
What factors influence your
metabolism?
 Hormones
 Exercise
 Diet
If you have an imbalance of
required nutrients, what may
happen?
 Weight gain
 Weight loss
 Disease
ILS Question
Insulin and glucagon are hormones that affect blood sugar levels.
The diagram below shows the feedback system used by the
human body to increase and decrease blood sugar levels.
This feedback system is one way that the human body
(1) circulates gases
(2) maintains equilibrium
(3) destroys viruses
(4) transports nutrients