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Q. What are the six criteria used to build a complete evolutionary branch of vertebrates?
Dichotomy in each of the six following criteria builds the vertebrate evolutionary branch: absence of mandibles separates cyclostomes from others absence of limbs separates fishes from the remaining absence of osseous skeleton separates chondrichthian (cartilaginous) fishes from osteichthyes absence of impermeable skin separates amphibians from the terrestrial vertebrates absence of warm blood (homeothermic body) separates reptiles from birds and mammals absence of mammary glands and hair separates birds from mammals.
Which process may not reduce the toxicity of a chemical in the body?
(1) It should have high "calorific value" or heat content. (2) It should have "moderate ignition temperature". (lgnition temperature is the minimum temperature at which it s
Which are the three parts of the small intestine? The small intestine is separated into three portions: duodenum, jejunum and ileum. Digestion System - Image Diversity: smal
Q. What are the main prophylactic measures against malaria? The major preventive measures against malaria are the elimination of the treatment of infected people, vector mosqui
In the early days of microbiology, the disease producing submicroscopic agents were termed as 'filterable viruses' because of their ability to pass through conventional filters whi
Internal Factor - Factors Controlling Metamorphosis in Insects Likewise to the amphibian metamorphosis, moulting and metamorphosis in insects has been found to be initiated in
excretary organ of whale
Polynephritis in cattle Contagious bovine polynephritis is a specific infection of urinary tract of cattle. The causative agent is Corynebacterium renale, a rod shaped gram-po
sea divisions
Packaging for instruments and cassettes Packaging used for instruments and cassettes prior to sterilization includes wrap, paper pouches, plastic pouches, combination paper/pl
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