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Q. How do fishes do gas exchange?
Fishes "breath" through gills, branchiae or Gills, are highly vascularized organs specialized in gas exchange under water and present in aquatic animals (crustaceans, marine annelids, tadpoles and fishes). Gills are a respiratory organ (analogous, for instance, to lungs) containing very thin lamellae with many apparent blood vessels in direct contact with water.
In osteichthyes the gills are covered by a bony flap that protects them called as operculum, in chondrichthyes there are no opercula.
Uptake of Ammonia Ammonia (NH 3 ) diffuses freely across biological membranes according to its concentration gradient. However, ammonium (NH + 4 ) ion requires a specific tra
The Peripheral membrane proteins are less strongly bound to the lipid bilayer than integral membrane proteins and can be readily erased through washing the membranes wi
Define working of Kidney in excretion of zinc in humans? Very small amount of zinc is excreted in the urine (0.3-0.7 mg/day), as most of the zinc filtered by the kidney is reab
what is working of heart
Explain Fomivirsen Fomivirsen, an antisense oligonu- cleotide, is FDA-approved for intravitreal treatment of CMV retinitis in HIV-infected patients who cannot tolerate or ha
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A DNA library is a collection of cloned DNA fragments in a cloning vector which can be fined for a DNA of interest. If the target is to isolate particular gene sequences.
Define absorption, transport and excretion of magnesium? Magnesium absorption to some extent is similar to that of Ca. Absorption of Mg occurs throughout the small intestine, a
Q. Is water a non-polar or a polar molecule? What is the consequence of that characteristic for the function of water as solvent? Ans. Water is made of two atoms of hydrog
What are hormones? Hormones are substances secreted by the endocrine glands and collected by the circulation that act to make effects upon exact organs and tissues. Hormones
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