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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.
Myocardial contractility is mostly dependent on the level of sympathetic nerve activity and is also increased by circulating catecholamines and inotropic drugs like dopamine and do
Define Precautions for Quantitative Determination of Viable Microbes? 1. Dilution should be made carefully. 2. Use fresh sterile pipette for making each dilution. 3. Asep
Why do preserved foods not spoil? Plant and animal cells must stay in an isotonic, or neutral, solution to survive. When salt or sugar is added, more of the cells wither and di
long ans about types of ovules
POLYMORPHISM IN COLENTRATAtion..
What is Lactation? High levels of estrogens and progesterone during pregnancy stimulate the breasts to develop prior to lactation, or milk production. At the same time, levels
What are the stomata? How these structures participate in the plant transpiration? The Stomata (singular, stoma) are small specialized passages for gases and water present in t
What are seed gums? What are its characteristic properties? Seed gums are a group of polysaccharides with the following properties: light to dark cream colored amorphou
What is the epidermis..
An amino acid is amphiprotic (have both acid and base) o Some are polar, non polar, acidic or basic List of amino acids (red are non-polar, yellow are
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