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Bacteria are the smallest known living things with a
cellular structure. ___1___
colorless, one-celled micro-organisms exist ___2___
organic matter is found:
in soil, in water ___3___ in the air. Since most of them
have ___4___
chlorophyll, they cannot use light energy to
synthesize ___5___ food, as green
plants ___6___. They must get their food in other
___7___.
In this,
bacteria ___8___ animals. However,
___9___ they are enclosed
in a
cell wall, they can ___10___ absorb dissolved food like
plants do. ___11___ most bacteria do not contain chlorophyll, some
of them can
___12___ their own organic food from simple inorganic
materials. They do
not, ___13___, use light energy for this
___14___. Others
get
ready-made food ___15___ dead plants and animals. Still
___16___
are parasites. Parasites are able to enter ___17___
living organisms and take
___18___ from them. In doing so, they often
___19___
diseases or the death ___20___ their hosts. |
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| Answers |
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| 1.
These
2. wherever 3. and 4. no
5. their 6. do 7.
ways 8.
resemble 9. since/as 10. only 11.
Although 12. make 13.
however 14. purpose 15. from 16.
others
17. other 18. food 19. cause
20. of |
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Bacteria are the smallest known living things with a
cellular structure. These
colorless, one-celled micro-organisms exist
wherever
organic matter is found:
in soil, in water and in the air. Since most of them
have no
chlorophyll, they cannot use light energy to
synthesize their food, as green
plants do. They must get their food in other
ways.
In this,
bacteria resemble animals. However,
since/as they are enclosed
in a
cell wall, they can only absorb dissolved food like
plants do. Although most bacteria do not contain chlorophyll, some
of them can
make their own organic food from simple inorganic
materials. They do
not, however, use light energy for this
purpose. Others
get
ready-made food from dead plants and animals. Still
others
are parasites. Parasites are able to enter
other
living organisms and take
food from them. In doing so, they often
cause
diseases or the death of
their hosts. |
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