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Q. What is membrane?
Membrane is any delicate sheet that separates one region from another blocking or permitting completely or selectively the passage of substances. The skin, for instance, can be considered a membrane that separates the external from the internal of the body; cellophane, used in chemical laboratories to separate solutions, acts as a membrane too.
Which gas in each of the following pairs would you expect to be more soluble in water? Why? (a) Oxygen and Carbon Dioxide (b) Nitrogen and Ammonia (c) Methane and Hydrogen Sulfide.
Ovule The ovule, also known as the megasporangium is the forerunner of the seed. It consists of a central mound of tissue called the nucellus, which is enveloped by one or tw
Why is it not correct to assert that DNA self-replicates? DNA is not completely autonomous in its duplication process because the replication does not happen without enzymatic
The scientist who described cells as “many little boxes” was
Q. What are the Valvular heart diseases? Valvular heart disease is a common clinical problem. While rheumatic mitral valve disease seen more often in the underprivileged segmen
Give an example of how the public perception of science has been distorted or manipulated to serve an alternative purpose.
Magnesium - It is available in most of the plants, especially vegetables. By its deficiency diarrhoea is caused. Its important functions are - (a) Along with c
Q. Amphibian identity card. How are amphibians characterized according to examples of representing beings, basic morphology, circulation, skin, nitrogen waste, respiration, thermal
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Q. What is represented by the cellular secretion? Cell secretion is the removal to the exterior of substances produced by the cell for instance, hormones, mucus, and sweat, so
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