Transcript living tissues

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Matter can cycle through the biosphere because
biological systems do not use up matter, they
transform it.
Matter is Recycled within and between the
ecosystems.
Matter is assembles into living tissues or passed
out of the body as waste.
Just think, with every breath you take, you inhale
hundreds of oxygen atoms that might have been
inhaled by dinosaurs millions of years ago!!
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Plants and animals need water to live
Natural processes constantly recycle water
throughout the environment
Animals breathe out water vapor,
return water to the environment
through urination
 Plants pull water from the ground
and lose water from their leaves
through transpiration
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21 The diagram
shows physical
changes that
occur in the water
cycle. Which of
these shows
condensation?
AQ
B R Precipitation
C S Run Off of
D T ground water
Evaporation
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All life on earth is based on carbon. Carbon is a
key ingredient of living tissue.
Begins during photosynthesis in which CO2 gas
is converted to carbon molecules
Carbon molecules are then used for energy and
growth
As heterotrophs eat plants, they also gain this
energy from carbon
When the carbon is used, CO2 is released and
returned to the atmosphere
Glucose C6H12O6 is
produced by plants,
eaten by animals.
Photosynthesis
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Animals and plants
exhale CO2 which is
taken in by plants to
make glucose
Cellular Respiration
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Lightening and bacteria in the ground “fix”
Nitrogen into a form usable by plants.
It is absorbed by plants, through their roots as
nitrates, so they can be used to build amino
acids essential for building proteins, enzymes
and the nitrogen bases of DNA.
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All organisms require phosphorus for
growth
Phosphorus cycles in two ways
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In the short term cycle, phosphorus is found in
plants, animals eat plants, they die, and the
phosphorus returns to the soil
In the long term cycle, phosphorus is washed into
the sea and is incorporated into rock
WILL REWRITE
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The paths of water, carbon,
nitrogen, and phosphorous pass
from the nonliving environment to
living organisms and then back to
the nonliving environment
Ground Water: water retained
beneath the surface of the Earth
 Evaporation: water is heated by
the sun and reenters the
atmosphere
 Transpiration: water is drawn
from stomata in leaves of plants
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Water that is not evaporated
travels from plants to the
atmosphere through
transpiration and returns to the
Earth as rain.
Respiration: carbon dioxide is
given off as a byproduct of cellular
respiration
 Combustion: carbon is released
when fossil fuels are burned
 Erosion: Shells of dead organisms
(made of calcium carbonate) form
limestone. As limestone erodes,
carbon becomes available for other
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79% of the atmosphere is
Nitrogen
 Most organisms cannot use
Nitrogen in its atmospheric form
 Nitrogen Fixation: a few
bacteria (found in the soil and
on roots of some plants) have
enzymes that will break down
atmospheric nitrogen and form
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Assimilation: absorption and
incorporation of nitrogen into
plant and animal compounds
 Ammonification: the
production of ammonia by
bacteria during the decay of
nitrogen-containing urea
 Nitrification: the production of
nitrate from ammonia
 Denitrification: the conversion
of nitrate to nitrogen gas
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Phosphorous used in ATP and
DNA
 Phosphorous in rock dissolves in
water and is absorbed by plants
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Nonrenewable: Do not replenish
themselves naturally
Renewable: Replenish themselves
naturally
Alternative Fuels
 Recycling (reduce, reuse, recycle)
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