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-Nitrogen is inert in the atmosphere, so doesn’t mix with soil.
-Nitrogen in soils is a limiting factor for plant growth.
-Nematodes and fungi abound in healthy soils - both are essential for healthy plants because they retain
nitrogen (and other nutrients) in soils once it has been captured by nitrogen-fixing bacteria.
-The nematode - fungus relationship keeps nitrogen from going back to the atmosphere as a gas (methane).
-Capture mechanisms for both nematodes and Fungi are;
1.Paralyzing toxins.
2.Traps - numerous designs but mainly sticky.
-Other capture mechanisms may include:
Lethal lollipops.
Sticky nets.
Sticky spores.
Sticky rings.
Constricting rings.
jim items answered the question on February 18, 2019 at 08:15
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Date posted: February 18, 2019. Answers (1)
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Date posted: February 18, 2019. Answers (1)
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Date posted: February 18, 2019. Answers (1)
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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)
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a)Define.
b)Types of bio-pesticides.
c)Examples.
d)Advantages for use.(Solved)
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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)
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Giving their functions, state SIX enzymes involved in Eukaryotic DNA replication process.
Date posted: February 15, 2019. Answers (1)
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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)
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(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)
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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)