Download 1.4.8 Nutrient Recycling Crossword

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1.4.8 Nutrient Recycling Crossword
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4. The elimination of the waste products of metabolism
from a cell, tissue or organ (9)
6. The controlled release of energy from food, within the
cell/cells of an organism (11)
8. Any organism capable of making its own food from
inorganic materials, e.g. green plants (8)
9. The process in plants that makes food using light
energy (14)
16. A list of species such that each is food for the next
species in the list (4,5)
18. A heterotrophic organism that feeds on other
organisms. It cannot make its own food (8)
19. Removal of nitrates and nitrites from the soil by
converting them to ammonia and then nitrogen gas
(15)
20. Coal, oil, natural gas and turf formed from the remains
of dead plants and animals over long periods of time
(6,5)
1. Plants that have no proper flowers or seeds and no
chlorophyll. Eukaryotic in nature. Feed on organic
matter, e.g. mushrooms, yeasts, toadstools and
moulds. Found in a wide variety of habitats (5)
2. The addition of oxygen (oxidation) with the release of
energy; burning (10)
3. Bacteria which break down nitrates into ammonia and
nitrogen, and liberate free nitrogen to the atmosphere
(12)
5. Gaseous element needed by all plants and animals for
DNA and protein manufacture. Atmosphere composed
of 78% of this gas (8)
7. The conversion of ammonia to nitrites and nitrates
(13)
10. The non-living features of an ecosystem (i.e. the
physical and chemical conditions) that affect the
community (7)
11. The conversion of atmospheric nitrogen into a form
usable by plants (8)
12. An organism which feeds on and breaks down the
dead remains of organisms and excreta into simpler
substances (10)
13. Formation of carbohydrates (food) from inorganic
compounds without sunlight (14)
14. Bacteria found in the soil. They convert ammonia to
nitrite (10)
15. Microscopic unicellular organisms, prokaryotic in
nature, some cause disease (8)
17. Absorbed by plants and used as a source of nitrogen
for protein formation (7)
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