energy
used 7 the plant convert
glucose can be can
^
in respiration it into insoluble starch
How does a plant use
e
?
the
glucose can be used to glucose
S
make cellulose for tough cell the
glucose c a n be
walls
&
used to make lipids for
the convert
plant can the
storage
into amino acids to make
glucose
proteins
>
to make amino acids, the plant
must also need nitrate ions from t h e
soil
definition biomass > the to t a l m a ss of living material in a specific a re a at a specific time . It can be a
m e a s u re of carbon or m a ss of living tissue in a
given a re a .
" " "" "" " """ " "←
^①
"
.IE/-:-i
ignition wires an electrical cur rent is passed through the wires
sample to bur n
causing the
*
thermometer ( very accurate to measure the
temperature of the wa te r )
stir rer
ensures h e a t i s evenly distributed
the water
through of the
oxygen ensures all sarnie is burnt
vessels
sample of dehydrated tissue
, Energy Loss in Food chains
eg incomplete
gdigestion
.
9
ingestion movement
r
wheat 9 cattle → humans
← t respiration →
reproduction
respiration of
production a
biological excretion
Molecules
disease
efficiency energy used for growth (biomass
(
energy supplied energy
available
from ecosystem)
equation In Plants :
NPP =
GPP -
R
a n n
respiratory
netprimarg
production
gross losses
primary
production
In Animals :
ingested
equation N = I -
(F t R)
^ n n
net faeces respiratory
production Irene losses
ingest taking in food and therefore energy
digest break down
large molecules into smaller molecules
definitions egest forceable removal of indigestible organisms .
exc re te removal of waste products produced by an
organism
secrete substance produced and released from a cell /gland
energy is lost at each trophic level due to a
range of factors . This limits the
length of food chains .
To minimise losses :
energy
*
limit movement of animals
*
keep animals war m
*
minimise disease → vaccination & isolation
All the
energy in a food chair
originates from the s u n .