First Sentence
Living things are based on a total of 16 elements out of the 92 which exist on Earth. Read the first page
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These are the most frequently used words in this book.
acid
active
amino
another
aqaa
area
bacteria
bases
below
blood
body
bond
carbon
causes
cell
changes
chemicals
chromosomes
codes
concentration
describe
diagram
different
dioxide
disease
dna
does
down
during
effect
energy
enzyme
explain
food
form
found
function
give
given
heart
help
high
human
ii
important
increase
ions
known
may
membrane
molecules
move
need
needed
niccea
nucleus
number
ocr
organisms
oxygen
part
person
place
plant
pollen
pressure
primary
process
produce
produced
protein
questions
rate
reaction
remember
result
shape
shows
site
specific
stage
structure
substances
substrate
surface
system
takes
time
tissues
together
transport
tube
two
understand
use
used
valves
vessels
wall
water
