Transcript TOPIC: Plants AIM: What is photosynthesis?

TOPIC: Plants
Aim: Explain the process of photosynthesis.
Do Now: Natural Selection #7 (in your Natural
Selection reading notes)
HW: Section labeled HOMEWORK at the end
of today’s reading notes.
Tropisms Reading Notes due Friday.
CL Castle Learning due Wednesday, April 1st.
7. There are 3 types of polar bears: one with thick coats, one
with thin coats and one with medium coats. It is fall, soon to be
winter. The temperature is dropping rapidly and the bears must
remain warm or they will freeze to death. Many of the bears
have approximately 2 cubs (baby bears) each but due to
extreme temperatures, many mothers only have 1 cub left.
a. Identify the bears that natural selection selected
AGAINST and support your answer.
The bears with the thin coats were selected against because
they cannot adapt to the cold temperature and, as a result,
they die.
7. There are 3 types of polar bears: one with thick coats, one
with thin coats and one with medium coats. It is fall, soon to be
winter. The temperature is dropping rapidly and the bears must
remain warm or they will freeze to death. Many of the bears
have approximately 2 cubs (baby bears) each but due to
extreme temperatures, many mothers only have 1 cub left.
b. Identify the points of Darwin’s theory of Natural
Selection below from the scenario above.
• Variation: Bears with thin, medium and thick coats
• Overproduction: Bears have 2 cubs
• Competition: Cubs compete for resources (warmth)
• Survival of the fittest:
Bears with the thicker coat have the favorable adaptation
because they can withstand the extreme temperatures.
They survive, reproduce and pass on the trait to offspring.
c. Describe which bears would have greater
population in the spring. Support your answer.
In the spring, the population of bears with
thinner coats would be greater because they
can adapt to the warmer weather. Bears with
the thick fur may overheat and die.
• Very little variation in a
What can species
cause
extinction?
– major environmental change
– adaptation no longer favorable
– all organisms die = extinction
Contrast autotrophic and heterotrophic
nutrition.
1. Identify • LIGHT
the meaning
of the
prefix
photo-.
2. Identify • Putting things
the meaning together
of the
suffix
synthesis.
•
3. Describe
what occurs
during the
process of
photosynthesis.
Plant takes water
from the soil and
CO2 from the air
and combines them
using energy from
sunlight.
• Light energy is
converted to
chemical energy
4. Identify the • Chloroplasts
cell organelle
where
photosynthesis
occurs.
• Green pigment
5. Explain the
• Interacts with
function of
sunlight to split H2O
chlorophyll.
and CO2
• ABSORBS
SUNLIGHT
Some of the best sources of
chlorophyll I’ve found are in
raw:
bell peppers, broccoli,
brussel sprouts, green
cabbage, celery, collard
greens, kale, parsley,
romaine lettuce, spinach,
swiss chard, and turnip
greens
A
B
C
F
E
D
6. Identify the • H2O and CO2
raw materials
for
photosynthesis.
7. How does • Small holes in leaves
CO2 enter the • Stomata
plant?
8. Identify the • Sunlight
source of
energy that is
needed for
photosynthesis.
9. Identify the
products of
photosynthesis.
• C6H12O6 and O6
•
Used
to
produce
10. Explain the
energy
importance of
glucose.
• Stored as starch
11. Explain the • Used to cellular
respiration
importance of
oxygen.
Equation for photosynthesis
light
Carbon + water
Chlorophyll
dioxide
CO2
H2O
glucose + oxygen + water
(food)
C6H12O6
(wastes)
H2O
O2
1. Describe • Substance that
reflects a part of the
what a
visible spectrum and
pigment is.
absorbs the rest.
2. Explain • Green light is
why a plant reflected.
looks green. • The rest of the visible
light is absorbed.
3. Identify the • Red and blue
colors of the
visible spectrum
that are most
effective for
photosynthesis.
4. State 4
differences
between
photosynthesis
and aerobic
respiration.
PHOTOSYNTHESIS
Energy is stored.
AEROBIC RESPIRATION
Energy is released.
H2O and CO2 are raw materials C6H12O6 and O2 are raw materials
C6H12O6 and O2 are products H2O and CO2 are products
Takes place in chloroplasts
Takes place in mitochondria
Carbon B
dioxide
A Oxygen
C
ATP
Let’s review…
1. Identify the raw materials of photosynthesis.
2. Identify the cell organelle where
photosynthesis occur.
3. Identify the life process that the glucose
produced used for.
4. Describe one difference between
photosynthesis and cell respiration.
1. Identify the
common
ancestor.
2. Identify the
species that
have become
extinct. Why
did these
species
become
extinct?
Fossil records indicate that between 80 and
60 million years ago the structure of the
horned dinosaur underwent rapid changes
separated by long periods of stability. This
pattern of change best illustrates the
concept of
(1) use and disuse
(2) punctuated equilibrium
(3) gradualism
(4) enzyme specificity
Which concept is not a part of the
theory of evolution?
(1) Present-day species developed from
earlier species.
(2) Some species die out when
environmental changes occur.
(3) Complex organisms develop from
simple organisms over time.
(4) Change occurs according to the needs
of an individual organism to survive.
Review: Identify whether the substance is a raw
material, product or source of energy.
1.
2.
3.
4.
5.
Oxygen
Carbon dioxide
Sunlight
Water
Glucose
Green plants make food by the
process of
1.photosynthesis
2.respiration
3.excretion
4.digestion
The gas released during
photosynthesis is
1. oxygen
2. carbon dioxide
3. nitrogen
4. carbon monoxide
The basic food material
produced by green plants is
1.fat
2.glucose
3.proteins
4.minerals
The substance is green plants
that captures the sun’s light
energy is
1. chlorophyll
2. mesophyll
3. phloem
4. cuticle
During photosynthesis,
molecules of carbon dioxide
and water are changed into
1.oxygen and carbon dioxide
2.glucose and water
3.glucose and chlorophyll
4.oxygen and glucose
Which of the following materials
is not needed for
photosynthesis?
1.sunlight
2.chlorophyll
3.water
4.oxygen
A process in which glucose is
broken down to release energy
is called
1.diffusion
2.respiration
3.photosynthesis
4.osmosis
Aerobic respiration requires
1.oxygen
2.carbon dioxide
3.light
4.chlorophyll
One substance that is generated
from aerobic respiration is
1.ATP
2.protein
3.glucose
4.oxygen
Respiration occurs in
1.chloroplasts
2.nuclei
3.mitochondria
4.ribosomes