2. Choose a word from the box at the bottom of the page to fill in the gaps in the
sentences below. You can use words once, twice or not at all.
In animals, oxygen ___
into cells across cell membranes to be used i
out of cells.
V

In plants, carbon dioxide diffuses into cells to be used in
Water enters the roots of plants by
Water moves into cells throu
permeable membranes, which allow small molecules, such as w
pass through, but not large molecules.
Plants use a process called
root cells. This requires
diffuses
to move minerals such as nitrates
photosynthesis
osmosis