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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.
Explain Diffusion and Osmosis in cell structure? Diffusion and Osmosis : Diffusion through a cell membrane occurs as it does elsewhere, from an area of high concentration of
how parasitic protozoans exibit saprophtic mode of nutrition
What is the radula? What is the function of this organ? Some molluscs have a tongue-like structure with harsh saliences similar to small teeth. This structure is called radula
What are the types of muscle tissues? What are the morphological features that differentiate those types? There are three kinds of muscle tissue: the skeletal striated muscle t
Explain the Phase Contrast Microscop? Unpigmented and unstained living cells can be easily observed by phase contrast microscope. It has a special objective and a condenser th
Q. Areas affected in peptic ulcer? The areas affected in peptic ulcer (due to erosion) can be: 1. Lower part of the oesophagus. 2, stomach (lesser curvature - an urn, whe
what are the two reactants and the two products of a dehydration reaction/ What are the two reactants and products of a hydrolysis reaction
What does boiling do to an enzyme? Enzymes are denatured (their shape is changed so it doesn't work) when boiled.
Which of the following serves as an effector, or as part of an effector, that functions in a negative feedback system? A. Muscarinic Acetylcholine Receptors (mAChRs) in the SA
draw a sponge and label
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