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-The activity of soil organisms follows seasonal and daily patterns.
-In temperate systems, the greatest activity occurs in late spring when temperature and moisture conditions are optimal for growth.
-However, certain species are most active in the winter, others during dry periods, and still others in flooded conditions.
-Not all organisms are active at a particular time.
-Even during periods of high activity, only a fraction of the organisms are busily eating, respiring, and altering their environment.
-The remaining portion are barely active or even dormant.
-Many different organisms are active at different times and interact with one another, with plants, and with the soil.
-The combined result is a number of beneficial functions including nutrient cycling, moderated water
flow, and pest control.
jim items answered the question on February 18, 2019 at 08:27
- Discuss animal eat plant relationships using Fungi and Nematodes as an example in nitrogen fixation.(Solved)
Discuss animal eat plant relationships using Fungi and Nematodes as an example in nitrogen fixation.
Date posted: February 18, 2019. Answers (1)
- Discuss the soil food web found in most natural ecosystems.(Solved)
Discuss the soil food web found in most natural ecosystems.
Date posted: February 18, 2019. Answers (1)
- Discuss Linneaus’ hierarchy as classification method for microorganisms.(Solved)
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)
- Explain how earthworms move through the soil(Solved)
Explain how earthworms move through the soil.
Date posted: February 18, 2019. Answers (1)
- 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...(Solved)
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)
- Discuss the various evidences which show that evolution has taken place.(Solved)
Discuss the various evidences which show that evolution has taken place.
Date posted: February 15, 2019. Answers (1)
- Outline FOUR main stages of DNA replication.(Solved)
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)
- Briefly explain the meaning of apical dominance.(Solved)
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)