Compare the use of manure and fertilizers in maintaining soil fertility.
Manure adds nutrients to the soil without affecting its fertility. Fertilizers are chemicals which lower the fertility of the soil... View Article
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How do plants get nutrients?
Plants get nutrients from air, water and soil. There are sixteen nutrients essential for the growth of plants. Carbon and... View Article
List any three human activities which would lead to an increase in the carbon dioxide content of the air
Human activities are responsible for almost all of the increase in greenhouse gases in the atmosphere. The largest source of... View Article
Draw a labelled diagram of a neuron.
Neurons are the fundamental unit of the nervous system.The neuron is a specialized and individual cell, which is also known as... View Article
Diagrammatically show the difference between the three types of muscle fibres.
Skeletal Muscle Tissue These muscles are attached to the skeleton and help in its movement. Skeletal are voluntary muscles composed... View Article
How many types of elements together make up the xylem tissue? Name them.
Xylem is a conducting tissue which mainly helps in the conduction of water and minerals from the roots to other... View Article
How would you choose between two characteristics to be used for developing a hierarchy in classification?
For classifying an organism in a hierarchical fashion, the most fundamental and visible character is first taken into consideration. For... View Article
Will advanced organisms be the same as complex organisms? Why?
The advanced organisms will be the same as complex organisms. This is because there is a possibility that complexity in... View Article
What is the primary characteristic on which the broad division of organisms is made?
The basic characteristic on which organisms are primarily divided is the nature of cells. It is broadly classified as prokaryotic... View Article
Why do we classify organisms?
By classifying organisms, it is easier and more convenient to study their characteristics. They are put in groups with similar features. Advantages... View Article
How are the modes for reproduction different in unicellular and multicellular organisms?
Reproduction is the phenomenon which involves the production of an offspring by particular individual or individuals to propagate their species.... View Article
Only variations that confer an advantage to an individual organism will survive in a population. Do you agree with this statement? Why or why not?
Variations is the difference in the characters or traits among the individuals of a species sexual reproduction of organisms produces... View Article
Outline a project which aims to find the dominant coat color in dogs.
A variety of genes are responsible for the coat colour in dogs. At least 11 genes have been identified that... View Article
Can the wing of a butterfly and the wing of a bat be considered homologous organs? Why or why not?
The wings of a butterfly and the wings of a bat cannot be considered homologous because though the function of... View Article
Why is damage to the ozone layer a cause for concern? What steps are being taken to limit this damage?
Ozone layer is the protection layer of earth from the harmful rays. It plays a vital role in protecting all... View Article
If all the waste we generate is biodegradable, will this have no impact on the environment?
Anything can excess cause problems. Even if the waste are biodegradable, excess amount will end up by polluting our environment. This... View Article
What are the problems caused by the non-biodegradable wastes that we generate?
Non-biodegradable wastes are those who cannot be decomposed or dissolved by natural agents. Examples of non-biodegradable materials include fibres, shoes,... View Article
What is biological magnification? Will the levels of this magnification be different at different levels of the ecosystem?
Progressive increase in the concentration of non-biodegradable substances in a food chain is called biological magnification. The level of these... View Article
Will the impact of removing all the organisms in the trophic level be different for different trophic levels? Can the organisms of any trophic level be removed without causing any damage to the ecosystem?
Yes, the impact of removing all the organisms in a trophic level will be different for different trophic levels. Removing producers... View Article
What will happen if we kill all the organisms in one trophic level?
If we kill all the organisms in one trophic level then the food chain would end and ecological balance would... View Article
