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Describe Class Echinoidea in animal kingdom?
Sand dollars and sea urchins either have flattened disc-like bodies, or are somewhat spherical. While they lack the typical five-arm pattern, they do have five rows of tube feet that line the bottom of their shells. Sand dollars use their tube feet to walk on the ocean bottom, and sea urchins have movable spines that are used in locomotion. Echinoids feed by grazing on algae.
What is the concept of Mesonephric? Replaces the pronephros during development and is retained as functional kidney in adult fish and amphibians. Formed posterior to pronephros
what are inorganic species
classification and characteristics
Explain the Disadvantages of Fixation? Fixation has following disadvantages also. These are highlighted herewith: (i) It distorts the cell's appearance. (ii) Motility can
For many of the mammalian Hox genes, it has been possible to determine that some of them are more similar to one of the insect HOM-C genes than to the others. Describe an experimen
What is the action mechanism of the antibiotic penicillin? Penicillin, discovered by the Scottish doctor Alexander Fleming in 1928, is a drug that inhibits enzymes essential fo
Name two possible why the number of live bacteria cell have reached the stationary growth by 60hrs and start to die off after 12hrs?
What is the difference between taeniasis and cysticercosis? Taeniasis is the parasitic disease caused by the adult tapeworm installed within the human intestine. Cysticercos
Food chain is the simplest representation of energy flow in the community. At the base is energy stored in the plants, which are eaten by the small organisms, which in turn are ea
Noise Exposures - Factors Affecting Occupational Health Various equipment and processes generate noise of varying intensity and - frequency. In this respect ventilation system
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