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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.
Nucleic acid hybridization: This is a process by which a suitably labeled DNA or RNA from a known infectious agent is used to probe its complementary sequence unique to t
4 Put the following events in the most probable order. (a) Predatory birds poisoned by insecticide. (b) Trees sprayed with insecticide. (c) Earthworms eat leaves which f
Classification of plants and animals
Q. Classifications of mechanical cleaning devices? In general, three classifications of mechanical cleaning devices are available for the dental office. They are: ult
Explain Central and Peripheral Nervous System - Geriatric Nutrition? Age related changes occur in various senses related to the cranial nerves-vision, hearing, taste and smell
Diagram of a cell surface membrane. State the width of a cell surface membrane. (i) On which side of the membrane, shown in Figure, X or Y, is the cytoplasm of the cell?
what isoverome incompability
DIVISION PHASE OR MITOSIS (M- PHASE) Cell division was first observed by Naegeli 1842 in plant cells ,but thoroughly described by Eduard strasburger 1875. Fleming 1879 desc
Define Precautions for preparation of bacterial smear 1. The slide should not be greasy. 2. Hold the slide by their edges only. 3. Label should not come in contact with s
Diplotene: The paired chromosomes repel each other and begin to separate. Separation however, is not completed, because homologous chromosomes remain united by their point
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