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-The soil food web is the community of organisms living all or part of their lives in the soil.
-A food web diagram shows a series of conversions (represented by arrows) of energy and nutrients as
one organism eats another.
-All food webs are fueled by the primary producers: the plants, lichens, moss, photosynthetic bacteria, and algae that use the sun's energy to fix carbon dioxide from the atmosphere.
-Most other soil organisms get energy and carbon by consuming the organic compounds found in plants, other organisms, and waste by-products.
-A few bacteria, called chemoautotrophs, get energy from nitrogen, sulfur, or iron compounds rather than
carbon compounds or the sun.
-As organisms decompose complex materials, or consume other organisms, nutrients are converted from one form to another, and are made available to plants and to other soil organisms.
-All plants depend on the food web for their nutrition.
jim items answered the question on February 18, 2019 at 07:38
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Discuss Linneaus’ hierarchy as a classification method for microorganisms.
Date posted: February 18, 2019. Answers (1)
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Briefly explain how earthworms eat in the soil.
Date posted: February 18, 2019. Answers (1)
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Explain how earthworms move through the soil.
Date posted: February 18, 2019. Answers (1)
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One square foot of soil has an array of small invertebrates, hundreds, or even thousands of species, many of which are still unknown to science.Discuss at least 15 microorganism species showing their classification class.
Date posted: February 18, 2019. Answers (1)
- Discuss bio-pesticides as way of enhancing sustainable ecosystems under the following subheadings:
a)Define.
b)Types of bio-pesticides.
c)Examples.
d)Advantages for use.(Solved)
Discuss bio-pesticides as way of enhancing sustainable ecosystems under the following subheadings:
a)Define.
b)Types of bio-pesticides.
c)Examples.
d)Advantages for use.
Date posted: February 18, 2019. Answers (1)
- (a)(i)State two reasons why clot formation is important when a blood vessel is cut.
(ii)Explain what happens if a clot forms in a blood vessel in...(Solved)
(a)(i)State two reasons why clot formation is important when a blood vessel is cut.
(ii)Explain what happens if a clot forms in a blood vessel in the head.
(b)State two components of the diet that are needed in blood clotting.
(c)Name two proteins that are involved in clot formation.
Date posted: February 15, 2019. Answers (1)
- Giving their functions, state SIX enzymes involved in Eukaryotic DNA replication process.(Solved)
Giving their functions, state SIX enzymes involved in Eukaryotic DNA replication process.
Date posted: February 15, 2019. Answers (1)
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Discuss the various evidences which show that evolution has taken place.
Date posted: February 15, 2019. Answers (1)
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Outline FOUR main stages of DNA replication.
Date posted: February 15, 2019. Answers (1)
- How are the following structures of a leaf adapted to their function?
(a)Petiole.
(b)Veins.
(c)Palisade mesophyl.
(d)Guard cells.(Solved)
How are the following structures of a leaf adapted to their function?
(a)Petiole.
(b)Veins.
(c)Palisade Mesophyl.
(d)Guard cells.
Date posted: February 15, 2019. Answers (1)
- Two pieces of raw potato chips A and B were placed in two different solutions in petridishes and left to stand for thirty minutes. At...(Solved)
Two pieces of raw potato chips A and B were placed in two different solutions in petridishes and left to stand for thirty minutes. At the end of the experiment, A was soft and a bit shrivelled, B was turgid and had increased in size.
(a)State the process that was being investigated.
(b)Account for the observations made in each case.
Date posted: February 15, 2019. Answers (1)
- In an experiment, a piece of brain was removed from a rat.It was later found that the rat had large fluctuation of body temperature. Suggest...(Solved)
In an experiment, a piece of brain was removed from a rat. It was later found that the rat had large fluctuation of body temperature. Suggest the part of brain which had been removed.
Date posted: February 15, 2019. Answers (1)
- Distinguish between:
(a)Genotype and phenotype.
(b)Haploidy and diploidy.(Solved)
Distinguish between:
(a)Genotype and phenotype.
(b)Haploidy and Diploidy.
Date posted: February 15, 2019. Answers (1)
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Briefly explain the meaning of the term apical dominance.
Date posted: February 15, 2019. Answers (1)
- (a)Explain the meaning of the term test cross.
(b)Name the chromosomes which determine sex in humans.(Solved)
(a)Explain the meaning of the term test cross.
(b)Name the chromosomes which determine sex in humans.
Date posted: February 15, 2019. Answers (1)
- Explain why Lamarck's theory of inheritance was discarded(Solved)
Explain why Lamarck's theory of inheritance was discarded.
Date posted: February 15, 2019. Answers (1)
- (a)Define respiration.
(b)Give two differences between aerobic and anaerobic respiration.(Solved)
(a)Define respiration.
(b)Give two differences between aerobic and anaerobic respiration.
Date posted: February 15, 2019. Answers (1)
- (a)Name the method that can be used to calculate the total number of fish in a pond.
(Solved)
(a)Name the method that can be used to calculate the total number of fish in a pond.
Date posted: February 15, 2019. Answers (1)
- An organism was found to have the following characteristics.
-Jointed appendages.
-Body covered with a hard exoskeleton made of chitin.
-Lay eggs which later hatch into young...(Solved)
An organism was found to have the following characteristics.
-Jointed appendages.
-Body covered with a hard exoskeleton made of chitin.
-Lay eggs which later hatch into young ones.
-Has compound eyes.
-Body is segmented.
(a)Name the phylum to which the organism belongs.
(b)To which class does the organism belong?
(c)Give an example of an organism that belongs to this class.
Date posted: February 15, 2019. Answers (1)
- State the function of the deoxyribonuclei acid(DNA)molecule.(Solved)
State the function of the deoxyribonuclei acid (DNA)molecule.
Date posted: February 14, 2019. Answers (1)