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Q. In arthropods why isn't gas exchange done through cutaneous diffusion?
In arthropods the impermeability of the exoskeleton makes the way of gases difficult. In addition the new methods of respiration present in arthropods were preserved by evolution because they were more capable for those animals.
What is photoperiod? Photoperiod is the daily time period of light exposure of a living being. The photoperiod might be vary according to the period of the year.
Determine about the National Adult Reading Test The National Adult Reading Test (NART; Nelson, 1982) allows the researcher to obtain an estimate of an individual's IQ prior to
Explain root pressure? How can you demonstrate it experimentally? What is the cytological basis of Down's syndrome? Give two physical symptoms of this disorder. Describe why the
How different are fecundation in osteichthyes and in chondrichthyes? In chondrichthyes fecundation is internal by means of copulation. In osteichthyes fecundation generally is
Evolutionary Herbicide tolerant crops (HTC) Increased use of herbicide can result in increase in development of weed resistance to that herbicide either through
Compared to amphibians what is an example of evolutionary novelty present in beings of the class Reptilia against the loss of water through the skin? The reptile skin is kerat
How do white cells differ from red cells (a) In their structure, (b) Their function? a) White cells have nuclei, red cells do not have nucle
Exterrral and Internal Environment Let us try to understand the concept of environment with some examples. Can you identify the environment of a single carp fish in the pond? It
Explain the interaction of vitamin a with Proteins? Proteins: The protein status of an individual influences vitamin A status and transport because an inadequate protein intake
Chemical Properties of Fatty Acids Esterification Like any other organic acid, fatty acids also form esters with various alcohols. An alcohol such as glycerol is reacted
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