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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.
How is the yolk sac formed? What is the function of the yolk sac? The yolk sac is formed from the covering of the vitellus by some cells originated from the primitive gut. T
Explain Class Bivalvia in animal kingdom? This name of this Class reflects the group's most distinguishing feature. Clams, oysters, scallops and mussels all have two shells tha
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In which parts of the circulatory system are there valves? There are valves in the heart (between each atrium and ventricle, in the aorta and pulmonary artery), in some of the
Cleavage and Gastrulation Eventually, one spermatozoon fuses with the ovum to r restore the diploid genomic condition and activates all the potentials in the fertilized egg ce
How do we define an living organism
Q. In what order should Personal Protection be removed? Personal protection is removed in following order: Gloves Mask Glasses Wash hands
Asexual Reproduction Asexual reproduction is also known agamic reproduction because there is no involvement of gametes in it. Asexual methods of reproduction are
Each gene has a characteristic mutation rate. Mutation rates are often described as an average per gene basis. For instance, Drosophila has one detectable mutation per 10,000 loci,
Birth of Genetics Modern genetics originated with Gregor Mendel's work. It is based on this paper entitled "Experiments in Plant Hybridisation " published in 1866 inqthe Procee
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